Some fragments that change the active structure of drug molecules, like mechanical parts, can be installed on the drug molecule skeleton to improve the drug activity and reduce side effects.
(S)-2-(tert-butoxycarbonyl)pent-4-enoic acid...
CAS RN
221352-64-3
Appearance
White to off white solid
Purity
>97%
CAS RN
598-42-5
Appearance
White to off-white or pale yellow powder
Purity
4-(TRIFLUOROMETHYL)BENZOIC ANHYDRIDE
CAS RN
25753-16-6
Appearance
Off-white to white crystalline powder
Purity
≥98.0% GC
4-Hydroxy-6-(trifluoromethyl)pyrimidine
CAS RN
1546-78-7
Appearance
White solid
Purity
>98% HPLC
N-(2-Aminoethyl)maleimid trifluoroacetate salt
CAS RN
146474-00-2
Appearance
Off white solid
Purity
95% HPLC
N-Benzyl-N-(methoxymethyl)trimethylsilylmethylamine
CAS RN
93102-05-7
Appearance
Colorless to yellow liquid
Purity
≥80.0%
N-Cbz-piperidine-2-carboxylic acid
CAS RN
84358-13-4
Appearance
White crystalline powder
Purity
98% HPLC
N-Cbz-piperidine-2-carboxylic acid
CAS RN
84358-13-4
Appearance
White crystalline powder
Purity
98% HPLC
2-Chloro-1-methylpyridinium p-toluenosulfonate
CAS RN
7403-46-5
Appearance
White to almost white crystals
Purity
98% HPLC
5,7-Dichloropyrazolo[1,5-a]pyrimidine
CAS RN
57489-77-7
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
Di-tert-butyl N,N-diethylphosphoramidite
CAS RN
117924-33-1
Appearance
Yellow liquid
Purity
98% GC
METHYL 1-BENZYL-4-OXOPYRROLIDINE-3-CARBOXYLATE
CAS RN
329956-53-8
Appearance
Pale yellow viscous liquid
Purity
>95% HNMR
Methyl 1-methylpiperidine-4-carboxylate
CAS RN
1690-75-1
Appearance
Light yellow liquid
Purity
98% GC
CAS RN
101385-93-7
Appearance
White to off white powder
Purity
99% GC
O-(2,4-dinitrophenyl)hydroxylamine
CAS RN
33543-55-4
Appearance
White to off white solid
Purity
99% HPLC
CAS RN
1631-26-1
Appearance
Off white to white crystalline powder
Purity
98%HPLC
DMEAD, Bis(2-methoxyethyl) diazene-1,2-dicarboxylate
CAS RN
940868-64-4
Appearance
Yellow Powder
Purity
≥98% HPLC
7-BENZYL-5,6,7,8-TETRAHYDRO-3H-PYRIDO[3,4-D]PYRIMIDIN-4-ONE...
CAS RN
62458-96-2
Appearance
White solid powder
Purity
>98% HPLC
CAS RN
2404-75-3
Appearance
colorless liquid
Purity
>99% GC
Pyridine-2,6-dicarboximidamide Dihydrochloride
CAS RN
1394382-56-9
Appearance
White to off-white powder
Purity
98~102% T
5-methoxy-2,3,3-trimethylindoline
CAS RN
41382-23-4
Appearance
Yellow liquid
Purity
99,00%
4-Aminopyrazolo[3,4-d]pyrimidine
CAS RN
2380-63-4
Appearance
Light yellow to yellow or light brown powder
Purity
≥98% HPLC
FMMB 2-Fluoro-N-methoxy-N-methylbenzamide
CAS RN
198967-24-7
Appearance
Colorless Transparent Liquid
Purity
≥98%GC
CAS RN
40499-83-0
Appearance
Pale yellow transparent liquid or almost white solid
Purity
98% GC
2-[2-(2-AZIDOETHOXY)ETHOXY]ETHANOL
CAS RN
86520-52-7
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
CAS RN
1235983-26-2
Appearance
Pale yellow solid
Purity
Conform to the nuclear magnetic spectrum
Triphenyl(2-pyridylmethyl)phosphonium chloride hydrochloride
CAS RN
99662-46-1
Appearance
Off-white to white powder
Purity
Titration: 102.3%
CAS RN
109-85-3
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
4-Amidinobenzamide hydrochloride
CAS RN
59855-11-7
Appearance
White solid powder
Purity
98% HPLC
N-Boc-1h-pyrazole-1-carboxamidine
CAS RN
152120-61-1
Appearance
White crystal
Purity
98% HPLC
N-Amidino-N'-(p-isopropyl-benzyliden)-hydrazin
CAS RN
35404-63-8
Appearance
White solid
Purity
98% H-NMR
N-tert-butoxycarbonyl-(methylamino)acetaldehyde
CAS RN
123387-72-4
Appearance
Pale yellow to colorless transparent liquid
Purity
98% GC
(4-Fluorobenzyl)triphenylphosphonium chloride
CAS RN
3462-95-1
Appearance
White crystalline powder
Purity
99% HPLC
Chloroformamidine hydrochloride
CAS RN
29671-92-9
Appearance
White crystalline powder
Purity
98%AT
CAS RN
38353-06-9
Appearance
Pale yellow to yellow solid
Purity
98% HPLC
1-Boc-4-piperidyl Methacrylate
CAS RN
1229727-38-1
Appearance
White to light yellow solid or colorless to light yellow liquid
Purity
≥98% GC
2-(2-chloro-5-nitrophenyl)pyridine
CAS RN
879088-40-1
Appearance
Pale yellow to yellow solid
Purity
≥98.0%
4-Fluorophenylhydrazine hydrochloride
CAS RN
823-85-8
Appearance
White to off white solid
Purity
98%HPLC
N,O-Dimethylhydroxylamine hydrochloride
CAS RN
6638-79-5
Appearance
White to yellowish crystalline powder
Purity
98%-103%(T)
(S)-tert-butyl (1-cyano-2-(4-iodophenyl)ethyl)carbamate
CAS RN
1159489-37-8
Appearance
White to pale yellow powder
Purity
≥98.0%
2,4-Dimethoxy-4-hydroxyacetophenone
CAS RN
41351-30-8
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
2,5-dichloro-N-(2-(isopropylsulfonyl)phenyl)pyrimidin-4-amin...
CAS RN
761440-16-8
Appearance
Off white to white solid powder
Purity
98% HPLC
CAS RN
78191-00-1
Appearance
Colorless Transparent Liquid
Purity
98% GC
CAS RN
593-56-6
Appearance
White or yellowish crystals
Purity
98%-103(AT)
N-(2-Aminoethyl)methacrylamide Hydrochloride
CAS RN
76259-32-0
Appearance
White to off-white powder
Purity
98-102%(T)
CAS RN
43036-06-2
Appearance
Yellow to dark brown liquid
Purity
98%GC
N-Cbz-piperidine-4-carboxylic acid
CAS RN
10314-98-4
Appearance
White or almost white crystalline powder
Purity
98% GC
(R)-(-)-2,2-Dimethyl-1,3-dioxolane-4-methanol
CAS RN
14347-78-5
Appearance
Colorless to yellowish transparent liquid
Purity
98% GC
1-(cyclopropylcarbonyl)-Monohydrochloride
CAS RN
1021298-67-8
Appearance
Off white to white powder
Purity
98% T
1-Boc-piperidine-3-carboxamide
CAS RN
91419-49-7
Appearance
White or light yellow powder
Purity
97% HPLC
2-(1-Hydroxy-3-methylbutylidene)-5,5-dimethyl-1,3-cyclohexan...
CAS RN
172611-72-2
Appearance
Colorless to pale yellow or orange transparent liquid
Purity
≥98.0%
2-[2-(2-Aminoethoxy)ethoxy]ethanol
CAS RN
6338-55-2
Appearance
Colorless to pale yellow transparent liquid
Purity
≥98.0% GC
CAS RN
874-86-2
Appearance
White acicular crystal
Purity
98%HPLC
CAS RN
3378-72-1
Appearance
Colorless to pale yellow or orange transparent liquid
Purity
≥98.0%
O-(4-Nitrobenzyl)hydroxylamine hydrochloride
CAS RN
2086-26-2
Appearance
Off white to yellowish crystalline powder
Purity
98% HPLC
tert-Butyl (2-(benzylamino)ethyl)carbamate
CAS RN
174799-52-1
Appearance
Colorless or light yellow liquid
Purity
>98% HPLC
4,5,6,7-tetrahydro-1H-benzoimidazole
CAS RN
3752-24-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
Ethyl iminobenzoate hydrochloride
CAS RN
5333-86-8
Appearance
White crystalline powder
Purity
98%HPLC
P-nitrophenylhydrazine hydrochloride
CAS RN
636-99-7
Appearance
Light brown powdery solid
Purity
>98%(HPLC, HNMR)
Triethyl 1,1,2-ethanetricarboxylate
CAS RN
7459-46-3
Appearance
Off white to white solid powder
Purity
>98% HPLC
(R)-N-Cbz-piperidine-3-carboxylic acid
CAS RN
78190-11-1
Appearance
White to almost white crystalline powder
Purity
98% HPLC
1,3-Bis(tert-butoxycarbonyl)guanidine
CAS RN
154476-57-0
Appearance
Off-white to light yellow solid powder
Purity
98% HPLC
Methyl (triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White powder
Purity
99.2% HPLC
Methyl 4-(diethylcarbamoyl)benzoate
CAS RN
122357-96-4
Appearance
Pale yellow transparent liquid
Purity
98% HPLC
METHYLBENZIMIDATE HYDROCHLORIDE
CAS RN
5873-90-5
Appearance
White solid
Purity
Titration content 101.5%
N-(4-Cyanophenyl)guanidine hydrochloride
CAS RN
373690-68-7
Appearance
White crystal
Purity
98%HPLC
Di-tert-Butyl azodicarboxylate
CAS RN
870-50-8
Appearance
Yellow crystalline powder
Purity
98%GC
ethyl 6-bromo-1,4-dihydro-4-oxoquinoline-3-carboxylate
CAS RN
122794-99-4
Appearance
White to off white solid powder
Purity
>98.0% H-NMR
Methyl 1-Boc-piperidine-3-carboxylate
CAS RN
148763-41-1
Appearance
Off white to light yellow powder
Purity
98% GC
2-Hydroxypyrimidine hydrochloride
CAS RN
38353-09-2
Appearance
Pale yellow powder
Purity
>98%(HPLC)
4-Amino-2,6-dimethoxypyrimidine
CAS RN
3289-50-7
Appearance
Off white to yellow powder
Purity
≥98% HPLC
CAS RN
5637-42-3
Appearance
Quasi white crystal
Purity
98%HPLC
N-Succinimidyl 6-(3-Maleimidopropionamido) Hexanoate(SMPH...
CAS RN
367927-39-7
Appearance
Off white to white solid
Purity
>97%
(4-Chloro-7H-pyrrolo[2,3-d]pyrimidin-7-yl)methyl pivalate
CAS RN
1146629-75-5
Appearance
Off white to white solid powder
Purity
98% HPLC
CAS RN
1594-57-6
Appearance
White crystalline powder
Purity
≥99%HPLC
CAS RN
165454-06-8
Appearance
Colorless to pale yellow transparent liquid
Purity
≥98.0%
CLMMB 4-Chloro-n-methoxy-n-methylbenzamide
CAS RN
122334-37-6
Appearance
Colorless Transparent Liquid
Purity
≥98%GC
methyl 2-((tert-butoxycarbonyl)oxy)acetate
CAS RN
878395-91-6
Appearance
colorless liquid
Purity
99% GC
Succinimidyl-[4-(N-maleimidomethyl)]-cyclohexane-1-carboxy-(...
CAS RN
125559-00-4
Appearance
White solid
Purity
>95%
CAS RN
5962-42-5
Appearance
White crystalline powder
Purity
95%(NMR P)
CAS RN
3680-71-5
Appearance
Off white to white solid powder
Purity
>98% HPLC
Tert-butyl amidinomethylcarbamate hydrochloride
CAS RN
691898-38-1
Appearance
White powder
Purity
≥98% HPLC
CAS RN
775-16-6
Appearance
Colorless to yellowish transparent liquid
Purity
98%GC
CAS RN
87276-51-5
Appearance
Off white to yellowish powder
Purity
>99.0%
Boc-NH-PEG3;Boc-1-amino-3,6-dioxa-8-octanediamine...
CAS RN
153086-78-3
Appearance
Colorless transparent liquid
Purity
≥98.0%
CAS RN
85916-13-8
Appearance
Off white to white solid
Purity
97% GC
CAS RN
3209-71-0
Appearance
Pale yellow to off white solid
Purity
97% HPLC
CAS RN
34570-17-7
Appearance
White crystal
Purity
98% HPLC
N-(Diphenylmethylene)glycine ethyl ester
CAS RN
69555-14-2
Appearance
Off white to white powder
Purity
98% HPLC
(R)-4-bebzyloxymethyl-2,2-dimethyl-1,3-dioxolane
CAS RN
14347-83-2
Appearance
Pale yellow to colorless liquid
Purity
98% HPLC
CAS RN
133975-85-6
Appearance
Colorless viscous liquid
Purity
>98%
Methyl 4-(chlorocarbonyl)butanoate
CAS RN
1501-26-4
Appearance
Yellow liquid
Purity
98%GC
N-(tert-butoxycarbonyl)-1,3-phenylenediamine
CAS RN
68621-88-5
Appearance
Beige crystalline powder
Purity
98% GC
CAS RN
71195-85-2
Appearance
Colorless to yellowish liquid
Purity
98%GC
CAS RN
500-73-2
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
CAS RN
1546-79-8
Appearance
Pale yellow to colorless liquid
Purity
≥98% GC
2-Thiazolecarboxamidine Hydrochloride
CAS RN
247037-82-7
Appearance
Off white to white solid powder
Purity
>99% HPLC
CAS RN
89797-68-2
Appearance
White crystalline powder
Purity
98%HPLC
Morpholine-4-carboxiMidaMide hydrochloride
CAS RN
5638-78-8
Appearance
White powder
Purity
>98% HNMR
CAS RN
40101-31-3
Appearance
White solid
Purity
≥98% HPLC
N-(tert-Butoxycarbonyloxy)phthalimide
CAS RN
15263-20-4
Appearance
White to off white solid
Purity
≥95% HPLC
N-Boc-imino-(triphenyl)phosphorane
CAS RN
68014-21-1
Appearance
White crystal
Purity
98% HPLC
N-Methoxy-n-methyltrifluoroacetamide
CAS RN
104863-67-4
Appearance
Colorless Transparent Liquid
Purity
≥98%GC
CAS RN
4144-22-3
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
CAS RN
1703794-73-3
Appearance
Off white to white solid powder
Purity
>97% T
CAS RN
139585-70-9
Appearance
White to off white solid
Purity
97% HPLC
3-(TRIFLUOROMETHYL)PYRAZOLE-4-CARBOXYLIC ACID ETHYL ESTER
CAS RN
155377-19-8
Appearance
Pale yellow to yellow solid
Purity
98.0%(HPLC)
3-Methoxybenzamidine hydrochloride
CAS RN
26113-44-0
Appearance
White crystalline powder
Purity
≥98.0 %
CAS RN
2439-85-2
Appearance
Pale yellow crystalline powder
Purity
96% T
Suberate Bis(sulfosuccinimidyl) Sodium Salt
CAS RN
127634-19-9
Appearance
White solid
Purity
HNMR>90%
4-Methylbenzene-1-carboximidamide hydrochloride
CAS RN
6326-27-8
Appearance
White powder
Purity
98% HPLC
CAS RN
7583-53-1
Appearance
Colorless transparent to yellow liquid
Purity
98% GC
1-BUTYL-3-METHYLIMIDAZOLIUM BIS(TRIFLUOR)
CAS RN
174899-83-3
Appearance
Colorless to yellowish transparent liquid
Purity
99% HPLC
2,4-Dichlorothieno[3,2-d]pyrimidine
CAS RN
16234-14-3
Appearance
Off white to white crystalline powder
Purity
≥98%HPLC
1-Boc-piperidine-2-carboxamide
CAS RN
388077-74-5
Appearance
White or almost white crystalline powder
Purity
97% GC
2-Methoxyphenylhydrazine hydrochloride
CAS RN
57396-67-5
Appearance
Off white to pink powder
Purity
≥98.0% HPLC
3-aminopyridin-1-ium-1-olate hydrochloride
CAS RN
65600-69-3
Appearance
Pale yellow solid powder
Purity
99.4% HPLC
6-Bromopyridine-2-carbaldehyde
CAS RN
34160-40-2
Appearance
Pale yellow powder
Purity
98%HPLC
Benzyl 3-pyrroline-1-carboxylate
CAS RN
31970-04-4
Appearance
Yellow liquid or yellow to almost white solid
Purity
98% GC
Methyl 2,5-dioxo-2H-pyrrole-1(5H)-carboxylate
CAS RN
55750-48-6
Appearance
Off white to white crystalline powder
Purity
≥98%HPLC
Methyl piperidine-2-carboxylate
CAS RN
41994-45-0
Appearance
Colorless to yellowish liquid
Purity
98% GC
CAS RN
7450-69-3
Appearance
Off white to white powder
Purity
≥98.0%
tert-Butyl4-oxo-4,5,6,8-tetrahydropyrido[3,4-d]pyrimidine-7(...
CAS RN
1142188-60-0
Appearance
Off white to white solid powder
Purity
>97% HPLC
TMAD N,N,N',N'-tetramethylazodicarboxamide
CAS RN
10465-78-8
Appearance
Yellow solid
Purity
98%HPLC
2,5-dichloro-4-({2-[dioxo(prop-2-yl)-λ6-sulfanyl]phenyl}amin...
CAS RN
761440-16-8
Appearance
White to off white solid
Purity
99.5% HPLC
2-Fluoro-5-[(3-oxo-1(3H)-isobenzofuranylidene)methyl]-benzon...
CAS RN
763114-25-6
Appearance
Yellow to white powder
Purity
>98% HPLC
2-Methyl-1-(4-methylphenyl)sulfonylimidazole
CAS RN
86181-71-7
Appearance
White crystalline powder
Purity
98%HPLC
Ethyl 1-benzylpiperidine-4-carboxylate
CAS RN
24228-40-8
Appearance
Colorless to light yellow liquid
Purity
98% HPLC
Methyl 1-Boc-piperidine-4-carboxylate
CAS RN
124443-68-1
Appearance
Light yellow liquid
Purity
98% GC
N-(Diphenylmethylene)glycerine tert-butyl ester
CAS RN
81477-94-3
Appearance
White to almost white crystalline powder
Purity
98% HPLC
N-Boc-N-methoxy-3-aminopropionic acid
CAS RN
172299-81-9
Appearance
Colorless Transparent Liquid
Purity
98% HNMR
2-methoxy-N,N-dimethylacetamide
CAS RN
4128-76-1
Appearance
Colorless to yellowish liquid
Purity
>97.0% GC
CAS RN
33545-98-1
Appearance
White powder
Purity
97%-102%(AT)
CAS RN
71999-74-1
Appearance
Light yellow to colorless transparent liquid or solid
Purity
≥98% GC
N-Isopropylhydroxylamine hydrochloride
CAS RN
50632-53-6
Appearance
White crystalline powder
Purity
97%AT
(S)-2-amino-3-((S)-2-oxopyrrolidin-3-yl)propanamide...
CAS RN
2628280-48-6
Appearance
Off white to white solid powder
Purity
>98.5% HPLC
CAS RN
130312-02-6
Appearance
Colorless transparent liquid or white solid
Purity
97% GC
1-tert-Butyl-3-ethylcarbodiiMide
CAS RN
1433-27-8
Appearance
Light yellow to colorless transparent liquid
Purity
≥98.0%
2-(3-CHLOROPROPYL)-2,5,5-TRIMETHYL-[1,3]-DIOXANE
CAS RN
88128-57-8
Appearance
Purity
≥98%
2-Chloroethylamine hydrochloride
CAS RN
870-24-6
Appearance
Off white to white crystals
Purity
98%-101%
2-Ethoxybenzamidine hydrochloride
CAS RN
18637-00-8
Appearance
White to off white powder
Purity
98% HPLC
CAS RN
773-64-8
Appearance
White crystalline powder
Purity
98% HPLC
3-Chlor-Benzamidine hydrochloride
CAS RN
24095-60-1
Appearance
White crystalline powder
Purity
98% HPLC
Boc-1,3-diaminopropane hydrochloride
CAS RN
127346-48-9
Appearance
White crystalline powder
Purity
98 %-103%(AT)
Ethyl 1-Boc-piperidine-3-carboxylate
CAS RN
130250-54-3
Appearance
Light yellow liquid
Purity
98% GC
CAS RN
16066-84-5
Appearance
Transparent liquid or white crystal
Purity
>98.0%(GC)
Ethyl 1-methyl-3-piperidinecarboxylate
CAS RN
5166-67-6
Appearance
Light yellow liquid
Purity
96% HPLC
11-Maleimidoundecanoic Acid Sulfo-N-Succinimidyl Ester
CAS RN
211236-68-9
Appearance
White to off white solid
Purity
>95% H-NMR
2-acetamido-3-(4-bromophenyl)propanoic acid
CAS RN
273730-59-9
Appearance
White solid
Purity
99% HPLC
CAS RN
16064-24-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
Pyrazine-2-carboximidamidehydrochloride
CAS RN
138588-41-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
TERT-BUTYL 2,4-DIOXOPIPERIDINE-1-CARBOXYLATE
CAS RN
845267-78-9
Appearance
White to light yellow crystalline powder
Purity
≥98%
4-Bromobenzamidine hydrochloride
CAS RN
55368-42-8
Appearance
Off white to white powder
Purity
99%HPLC
6-Hydroxy-2,3-dihydrobenzo[b]furan-3-one
CAS RN
6272-26-0
Appearance
Grey powder
Purity
98%HPLC
FMOC-1,4-DIAMINOBUTANE HYDROCHLORIDE
CAS RN
321660-77-9
Appearance
White powder
Purity
>98%
O-ButylhydroxylaMine Hydrochloride
CAS RN
4490-82-8
Appearance
White crystalline powder
Purity
98 %-103%(AT)
Tert-butyl n,n-bis(2-hydroxyethyl)carbamate
CAS RN
103898-11-9
Appearance
Pale yellow transparent liquid
Purity
97% HNMR
1-Boc-piperidine-4-carboxaldehyde
CAS RN
137076-22-3
Appearance
Off white powder
Purity
95% GC
2,2-DIETHOXYETHYLPHOSPHONIC ACID DIETHYL ESTER
CAS RN
7598-61-0
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
2-(Trifluoromethyl)phenylhydrazine hydrochloride
CAS RN
3107-34-4
Appearance
Pale yellow powder
Purity
98% HPLC
4-Amino-5-pyrimidinecarbonitrile
CAS RN
16357-69-0
Appearance
Off white to white solid powder
Purity
>97% HPLC
CAS RN
20872-93-9
Appearance
Off white to white solid powder
Purity
>98% HPLC
Glycine tert butyl ester hydrochloride
CAS RN
27532-96-3
Appearance
White crystalline powder
Purity
98.0%~102.0% (AgNO₃)
CAS RN
89180-61-0
Appearance
Pale yellow to colorless transparent liquid
Purity
97% HPLC
O-Acetyl-N-tert-butylhydroxylamine Hydrochloride
CAS RN
851074-40-3
Appearance
White crystalline powder
Purity
98%-103%(T); 97% HPLC
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