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.
CAS RN
598-42-5
Appearance
White to off-white or pale yellow powder
Purity
N-Benzyl-N-(methoxymethyl)trimethylsilylmethylamine
CAS RN
93102-05-7
Appearance
Colorless to yellow liquid
Purity
≥80.0%
2-Chloro-1-methylpyridinium p-toluenosulfonate
CAS RN
7403-46-5
Appearance
White to almost white crystals
Purity
98% HPLC
4-(TRIFLUOROMETHYL)BENZOIC ANHYDRIDE
CAS RN
25753-16-6
Appearance
Off-white to white crystalline powder
Purity
≥98.0% GC
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
(S)-2-(tert-butoxycarbonyl)pent-4-enoic acid...
CAS RN
221352-64-3
Appearance
White to off white solid
Purity
>97%
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-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
CAS RN
1527-89-5
Appearance
White crystal or colorless liquid
Purity
≥98%
CAS RN
22509-74-6
Appearance
Off white to white crystalline powder
Purity
97% HPLC
CAS RN
2645-22-9
Appearance
Off white to yellow solid
Purity
98%HPLC
CAS RN
5117-19-1
Appearance
Pale yellow liquid or white solid
Purity
98% HPLC
Methyl 1-Boc-piperidine-4-carboxylate
CAS RN
124443-68-1
Appearance
Light yellow liquid
Purity
98% GC
CAS RN
16499-56-2
Appearance
Off white to white solid powder
Purity
>98% HPLC
Benzylhydroxylamine hydrochloride
CAS RN
2687-43-6
Appearance
Off white to white solid
Purity
98%HPLC
Cyclohexylhydrazine hydrochloride
CAS RN
24214-73-1
Appearance
White crystal
Purity
99% T
(R)-N-Cbz-piperidine-3-carboxylic acid
CAS RN
78190-11-1
Appearance
White to almost white crystalline powder
Purity
98% HPLC
CAS RN
16066-84-5
Appearance
Transparent liquid or white crystal
Purity
>98.0%(GC)
1-(Diphenylmethyl)-3-azetidinyl methanesulfonate
CAS RN
33301-41-6
Appearance
White solid
Purity
>98% HPLC
CAS RN
2148-57-4
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
3473-63-0
Appearance
White to almost white crystal
Purity
≥99.0% T
CAS RN
1460-02-2
Appearance
White crystalline powder
Purity
98% GC
1-Boc-2-piperidinecarbaldehyde
CAS RN
157634-02-1
Appearance
Light yellow viscous liquid or solid
Purity
95% HPLC
CAS RN
584-13-4
Appearance
White crystalline powder
Purity
98%HPLC
CAS RN
5806-90-6
Appearance
Pale yellow to colorless liquid
Purity
>95%(GC, HNMR)
CAS RN
20691-89-8
Appearance
Transparent to yellowish liquid
Purity
97% GC
1H-1,2,4-triazole-1-carboxamidine monohydrochloride
CAS RN
19503-26-5
Appearance
White powder
Purity
98% HPLC
Biotinamidohexanoyl-6-aminohexanoic acid...
CAS RN
89889-52-1
Appearance
White solid
Purity
>95%
β-Alanine,N-[(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetyl]-b...
CAS RN
1954756-80-9
Appearance
Off-white to white solid
Purity
>98% HPLC
CAS RN
40114-49-6
Appearance
Pale yellow transparent liquid
Purity
99% GC
CAS RN
29897-82-3
Appearance
Colorless to yellowish liquid
Purity
>98%
CAS RN
27687-14-5
Appearance
White or light yellow crystalline powder
Purity
98% GC
(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
20327-23-5
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0% GC&T
Diphenylmethylene-Glycine benzyl ester
CAS RN
81477-91-0
Appearance
White powder
Purity
99% HPLC
CAS RN
172089-14-4
Appearance
Colorless to light yellow or orange oily substance
Purity
≥98% HPLC
CAS RN
89-91-8
Appearance
Colorless Transparent Liquid
Purity
98% GC
Tetraethylene Glycol Monobenzyl Ether
CAS RN
86259-87-2
Appearance
Pale yellow clear liquid
Purity
95% GC
CAS RN
36476-84-3
Appearance
White solid
Purity
>98% HPLC
3-Trifluoromethylbenzamidine hydrochloride
CAS RN
62980-03-4
Appearance
White powder
Purity
98%HPLC
CAS RN
18704-37-5
Appearance
Off white or white crystals
Purity
98%HPLC
Ethyl iminobenzoate hydrochloride
CAS RN
5333-86-8
Appearance
White crystalline powder
Purity
98%HPLC
CAS RN
26218-78-0
Appearance
White to off white solid
Purity
97%HPLC
N-(Diphenylmethylene)glycine ethyl ester
CAS RN
69555-14-2
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
18303-04-3
Appearance
White to off white powder
Purity
98%HPLC
N-Cbz-piperidine-4-carboxylic acid
CAS RN
10314-98-4
Appearance
White or almost white crystalline powder
Purity
98% GC
CAS RN
14273-92-8
Appearance
Colorless Transparent Liquid
Purity
97.4% GC
1-Ethyl-3-methylimidazolium ethylsulfate
CAS RN
342573-75-5
Appearance
White to off white solid
Purity
98% HPLC
3-Amino-3-iminopropanoic acid ethyl ester hydrochloride
CAS RN
57508-48-2
Appearance
Off white to white solid powder
Purity
>97%
CAS RN
1971-49-9
Appearance
White to off white solid
Purity
≥98% HPLC
P-nitrophenylhydrazine hydrochloride
CAS RN
636-99-7
Appearance
Light brown powdery solid
Purity
>98%(HPLC, HNMR)
1,3-Bis(tert-butoxycarbonyl)guanidine
CAS RN
154476-57-0
Appearance
Off-white to light yellow solid powder
Purity
98% HPLC
1-Boc-piperidine-4-carboxaldehyde
CAS RN
137076-22-3
Appearance
Off white powder
Purity
95% GC
2-amino-N-benzylacetamide hydrochloride
CAS RN
20432-97-7
Appearance
White crystalline powder
Purity
98-103% T
2-Bromo-5-fluoropyridine 1-oxide
CAS RN
935534-39-7
Appearance
Light yellow to almost white solid
Purity
≥98.0%
Ethyl (hydroxyimino)cyanoacetate potassium salt
CAS RN
158014-03-0
Appearance
Yellow powdery solid
Purity
98.6% HPLC
CAS RN
14997-58-1
Appearance
White powder
Purity
98.5% HPLC; 98.5% T
Terephthalimidamidedihydrochloride
CAS RN
14401-56-0
Appearance
Off white to white solid powder
Purity
>98% HPLC
Tetraisopropylazodicarboxamide
CAS RN
155877-06-8
Appearance
Yellow solid
Purity
99%HPLC
CAS RN
57260-73-8
Appearance
Colorless Transparent Liquid
Purity
98%GC
tert-butyl methyl(2-oxopropyl)carbamate
CAS RN
532410-39-2
Appearance
Colorless Transparent Liquid
Purity
97.8% GC
Tert-butyl n,n-bis(2-hydroxyethyl)carbamate
CAS RN
103898-11-9
Appearance
Pale yellow transparent liquid
Purity
97% HNMR
1-Boc-piperidine-3-carboxamide
CAS RN
91419-49-7
Appearance
White or light yellow powder
Purity
97% HPLC
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
2-(carbamoylmethylamino)ethanesulfonic acid
CAS RN
7365-82-4
Appearance
White to off white powder
Purity
>97.0%
Ethyl 1-benzylpiperidine-4-carboxylate
CAS RN
24228-40-8
Appearance
Colorless to light yellow liquid
Purity
98% HPLC
Ethyl 1-Boc-3-pyrrolidinecarboxylate
CAS RN
170844-49-2
Appearance
Colorless to yellowish liquid
Purity
>97%
Methyl 2,5-dioxo-2H-pyrrole-1(5H)-carboxylate
CAS RN
55750-48-6
Appearance
Off white to white crystalline powder
Purity
≥98%HPLC
N-Isopropylhydroxylamine hydrochloride
CAS RN
50632-53-6
Appearance
White crystalline powder
Purity
97%AT
N-Methoxy-n-methyltrifluoroacetamide
CAS RN
104863-67-4
Appearance
Colorless Transparent Liquid
Purity
≥98%GC
Sulfo-N-succinimidyl 4-maleimidobutyrate sodium salt
CAS RN
185332-92-7
Appearance
White to off-white powder
Purity
>95% H-NMR
CAS RN
929-59-9
Appearance
Pale yellow clear liquid
Purity
>97% T
1-Aminopyrrolidine-2,5-dione,hydrochloride
CAS RN
108906-15-6
Appearance
White to off white powder
Purity
>98.0%(T)
CAS RN
130312-02-6
Appearance
Colorless transparent liquid or white solid
Purity
97% GC
CAS RN
7154-73-6
Appearance
Transparent colorless liquid
Purity
>97% T
1-(2-Tetrahydrofuroyl)piperazine hydrobromide
CAS RN
63590-62-5
Appearance
Off white powder
Purity
>97%(H-NMR)
2-Methoxyphenylhydrazine hydrochloride
CAS RN
57396-67-5
Appearance
Off white to pink powder
Purity
≥98.0% HPLC
SucciniMidyl 1-Pyrenebutanoate
CAS RN
114932-60-4
Appearance
Earthy yellow powder
Purity
98% HPLC
CAS RN
775-15-5
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(HPLC)
N-boc-ethylenediamine hydrochloride
CAS RN
79513-35-2
Appearance
White powder
Purity
98 %-103%(AT)
CAS RN
600-23-7
Appearance
colorless liquid
Purity
>95.0% H-NMR
1-(Cyanomethyl)piperidinium TetrafluoroborateTetramethyl...
CAS RN
434937-12-9
Appearance
Purity
CAS RN
3321-64-0
Appearance
Light yellow to white flaky solid
Purity
>98.0% qNMR
2-(2-bromoethyl)isoindoline-1,3-dione
CAS RN
574-98-1
Appearance
White to off white solid
Purity
>98%
4-(1-Acetylpiperazin-4-yl)phenol
CAS RN
67914-60-7
Appearance
Off white solid
Purity
>97% T
DIAD Diisopropyl azodicarboxylate
CAS RN
2446-83-5
Appearance
Orange liquid or crystalline solid
Purity
>98%
CAS RN
593-56-6
Appearance
White or yellowish crystals
Purity
98%-103(AT)
CAS RN
105264-63-9
Appearance
White to off white solid
Purity
≥98% T
2-(T-butyldimethylsiloxy)ethanol
CAS RN
102229-10-7
Appearance
Colorless to yellowish liquid
Purity
97%GC
CAS RN
89102-73-8
Appearance
Pale yellow to colorless transparent liquid
Purity
97% HPLC
DCAD Bis(4-chlorobenzyl) azodicarboxylate
CAS RN
916320-82-6
Appearance
Orange solid
Purity
≥98.0%HPLC
Ethyl N-Boc-piperidine-4-carboxylate
CAS RN
142851-03-4
Appearance
Light yellow liquid
Purity
97% GC
methyl 2-((tert-butoxycarbonyl)oxy)acetate
CAS RN
878395-91-6
Appearance
colorless liquid
Purity
99% GC
CAS RN
1013-88-3
Appearance
Colorless to yellowish liquid
Purity
98% GC
CAS RN
3209-71-0
Appearance
Pale yellow to off white solid
Purity
97% HPLC
N-(2-Aminoethyl)methacrylamide Hydrochloride
CAS RN
76259-32-0
Appearance
White to off-white powder
Purity
98-102%(T)
Tert-butyl 1H-1,2,4-triazole-1-carboxylate
CAS RN
41864-24-8
Appearance
White powder
Purity
97% HNMR
1-sec-butylhydrazine dihydrochloride
CAS RN
1177361-36-2
Appearance
White solid
Purity
滴定含量97%-103%
EOPC Ethyl N-Boc-4-Oxopyrrolidine-3-carboxylate
CAS RN
146256-98-6
Appearance
Off white solid
Purity
98% HPLC
CAS RN
404586-94-3
Appearance
White solid
Purity
Nuclear magnetic resonance qualified
N-ALPHA-CARBOBENZOXY-L-HISTIDINE HYDRAZIDE
CAS RN
49706-31-2
Appearance
White powder
Purity
≥98.0%
2-Ethoxybenzamidine hydrochloride
CAS RN
18637-00-8
Appearance
White to off white powder
Purity
98% HPLC
3-Phenyl-1H-pyrazole-4-carbaldehyde
CAS RN
26033-20-5
Appearance
White to yellow powder
Purity
98% HPLC
CAS RN
40499-83-0
Appearance
Pale yellow transparent liquid or almost white solid
Purity
98% GC
CAS RN
33545-98-1
Appearance
White powder
Purity
97%-102%(AT)
Glycine,N-(2-aminoethyl)-,ethyl ester chloride
CAS RN
24123-13-5
Appearance
Off white to white solid powder
Purity
>98% T
N,O-Dimethylhydroxylamine hydrochloride
CAS RN
6638-79-5
Appearance
White to yellowish crystalline powder
Purity
98%-103%(T)
CAS RN
120-43-4
Appearance
Pale yellow to colorless liquid
Purity
99%GC
2,5-dioxopyrrolidin-1-yl octanoate
CAS RN
14464-30-3
Appearance
White solid
Purity
>98%
Pyridine-2-carboximidamide hydrochloride
CAS RN
51285-26-8
Appearance
Off white to white solid powder
Purity
>98% HPLC
(2S)-2-(Methoxycarbonyl)pyrrolidin-1-ium chloride
CAS RN
2133-40-6
Appearance
White to off white microcrystalline powder
Purity
≥98%
CAS RN
1034-39-5
Appearance
Off white crystal or light yellow powder
Purity
97% T
CAS RN
34570-17-7
Appearance
White crystal
Purity
98% HPLC
CAS RN
26351-19-9
Appearance
Off white to white powder
Purity
≥98%HPLC
1-N-ethoxycarbonyl-3-pyrrolidone
CAS RN
14891-10-2
Appearance
Pale yellow to colorless transparent liquid
Purity
≥98%
3,8,11-Trioxa-5-azatridecan-13-oic acid
CAS RN
108466-89-3
Appearance
Off white to white solid powder
Purity
98% HPLC
Ethyl 2-[(diphenylmethylene)amino]-2-ethylbutanoate
CAS RN
189631-94-5
Appearance
Purity
CAS RN
301673-14-3
Appearance
White powder
Purity
Nuclear magnetic resonance qualified
CAS RN
17696-11-6
Appearance
Pale yellow to off white solid or transparent liquid
Purity
>97.0%(GC)
CAS RN
2424-92-2
Appearance
White to off-white powder
Purity
≥99% HPLC
METHYL 2,2,2-TRICHLOROACETIMIDATE
CAS RN
2533-69-9
Appearance
Colorless Transparent Liquid
Purity
97%(GC)
2-Amino-1,3-thiazole-4-carboxylate
CAS RN
118452-04-3
Appearance
Off yellow to white powder
Purity
98% HPLC
N-(TERT-BUTYL)-2-CHLOROACETAMIDE
CAS RN
15678-99-6
Appearance
White to almost white crystalline powder
Purity
≥98% HPLC
4-Methoxyphenylhydrazine hydrochloride
CAS RN
19501-58-7
Appearance
Off white powder
Purity
97%HPLC
(4-Fluorobenzyl)triphenylphosphonium chloride
CAS RN
3462-95-1
Appearance
White crystalline powder
Purity
99% HPLC
Methyl Pentafluorophenyl Carbonate
CAS RN
36919-03-6
Appearance
White crystalline solid or colorless liquid
Purity
98%HPLC
CAS RN
2398-81-4
Appearance
White to almost white or light yellow powder
Purity
≥98% HPLC
1-(Tert-butoxycarbonyl)-2-pyrrolidinone
CAS RN
85909-08-6
Appearance
Yellowish to colorless solid crystal
Purity
≥98%
2-(bis(2-hydroxyethyl)amino)acetic acid
CAS RN
150-25-4
Appearance
Off white solid
Purity
CAS RN
85916-13-8
Appearance
Off white to white solid
Purity
97% GC
CAS RN
30379-58-9
Appearance
Colorless Transparent Liquid
Purity
HPLC>96%,GC>97%
Phosphorochloridic acid diisopropyl ester
CAS RN
2574-25-6
Appearance
Colorless Transparent Liquid
Purity
97%GC
CAS RN
27988-97-2
Appearance
colorless liquid
Purity
0.45ML
3-(tert-Butoxycarbonylamino)propyl bromide
CAS RN
83948-53-2
Appearance
White to off-white powder
Purity
≥98.0% GC
3-Hydroxypyrrolidine hydrochloride
CAS RN
86070-82-8
Appearance
Off white solid
Purity
≥97%
4-Amino-5-pyrimidinecarbonitrile
CAS RN
16357-69-0
Appearance
Off white to white solid powder
Purity
>97% HPLC
1-Ethyl-1-methylpyrrolidinium bromide
CAS RN
69227-51-6
Appearance
Pale yellow solid powder
Purity
>97.0%(T)
2-(3-bromopropyl)isoindoline-1,3-dione
CAS RN
5460-29-7
Appearance
White powder
Purity
≥98.5%(HPLC)
3-Chlor-Benzamidine hydrochloride
CAS RN
24095-60-1
Appearance
White crystalline powder
Purity
98% HPLC
BENZOHYDROXAMIC ACID SODIUM SALT
CAS RN
22513-32-2
Appearance
White powder
Purity
>98% HPLC
palmitic acid N-succinimide ester
CAS RN
14464-31-4
Appearance
White solid
Purity
Conform to the nuclear magnetic spectrum
CAS RN
7583-53-1
Appearance
Colorless transparent to yellow liquid
Purity
98% GC
CAS RN
85908-96-9
Appearance
Colorless to yellowish liquid or white crystal
Purity
>98% HPLC
CAS RN
6627-89-0
Appearance
Colorless transparent liquid; 1.05 g/mL at 20 °C(lit.)
Purity
95%HPLC
(4-Carboxybutyl)triphenylphosphonium bromide
CAS RN
17814-85-6
Appearance
White to off white solid
Purity
98% HPLC
1,1,1,3,3,3-Hexafluoro-2-propanol
CAS RN
920-66-1
Appearance
Colorless Transparent Liquid
Purity
98% GC
TERT-BUTYL 2,4-DIOXOPIPERIDINE-1-CARBOXYLATE
CAS RN
845267-78-9
Appearance
White to light yellow crystalline powder
Purity
≥98%
2-Azido-1,3-dimethylimidazolinium Hexafluorophosphate
CAS RN
1266134-54-6
Appearance
White crystalline powder
Purity
98% HPLC
4-Fluorobenzamidine hydrochloride
CAS RN
456-14-4
Appearance
White to almost white crystalline powder
Purity
98%HPLC
DiMorpholinophosphinyl Chloride
CAS RN
7264-90-6
Appearance
Pale yellow to colorless transparent liquid
Purity
>97% T
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