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
41239-10-5
Appearance
Colorless to light yellow liquid
Purity
≥97.0%
Ethyl 1,3-dimethylpyrazole-5-carboxylate
CAS RN
5744-40-1
Appearance
Pale yellow transparent liquid
Purity
98%GC
2-Bromobenzamidine hydrochloride
CAS RN
57075-82-8
Appearance
White powder
Purity
≥98%HPLC
Ethyl 3-bromobenzenecarboximidoate hydrochloride
CAS RN
57508-63-1
Appearance
White solid
Purity
Methyl (triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White powder
Purity
99.2% HPLC
N-Amidino-N'-(p-isopropyl-benzyliden)-hydrazin
CAS RN
35404-63-8
Appearance
White solid
Purity
98% H-NMR
1-BUTYL-3-METHYLIMIDAZOLIUM BIS(TRIFLUOR)
CAS RN
174899-83-3
Appearance
Colorless to yellowish transparent liquid
Purity
99% HPLC
CAS RN
621-63-6
Appearance
Pale yellow to colorless liquid
Purity
98.0% GC,HNMR
4,6-dichloro-5-nitropyrimidine
CAS RN
4316-93-2
Appearance
Off white to yellowish solid powder
Purity
98% HPLC
5-Bromo-2,3-dihydroisoindol-1-one
CAS RN
552330-86-6
Appearance
Quasi white floc
Purity
99% HPLC
6-maleimidohexanoic acid pentafluorophenyl ester
CAS RN
692739-25-6
Appearance
White solid
Purity
99,60%
Isopropylhydrazine hydrochloride
CAS RN
16726-41-3
Appearance
White powder
Purity
99%AT
Methyl 1-Boc-piperidine-2-carboxylate
CAS RN
167423-93-0
Appearance
Light yellow liquid
Purity
98% GC
CAS RN
72648-80-7
Appearance
Light yellow to colorless transparent liquid or light yellow to white solid
Purity
98% GC
O-tert-butylhydroxylamine hydrochloride
CAS RN
39684-28-1
Appearance
Off white to light pink solid
Purity
98% T
CAS RN
228244-04-0
Appearance
White to off white solid
Purity
98% HPLC
1-Boc-piperidine-4-carboxamide
CAS RN
91419-48-6
Appearance
White or light yellow powder
Purity
97% HPLC
2-Chloro-1-(4-methoxyphenyl)ethanone
CAS RN
2196-99-8
Appearance
Quasi white crystalline powder
Purity
99%HPLC
3,5-dimethylpyrazole-1-carboxamidine
CAS RN
22906-75-8
Appearance
Light pink to almost white powder
Purity
≥98% HPLC
Nalpha-Fmoc-L-lysine hydrochloride
CAS RN
139262-23-0
Appearance
Off white to white solid
Purity
98% HPLC
1-BUTYL-3-METHYLIMIDAZOLIUM DICYANAMIDE
CAS RN
448245-52-1
Appearance
Off white to yellowish liquid
Purity
97% NMR
4-AMIDINOPYRIDINE HYDROCHLORIDEPYRIDINE-4-CARBOXIMIDAMIDE...
CAS RN
6345-27-3
Appearance
White crystalline powder
Purity
>97% T
BEAZ Bis(2,2,2-trichloroethyl) azodicarboxylate
CAS RN
38857-88-4
Appearance
Yellow crystalline powder
Purity
≥98%HPLC
CAS RN
3426-71-9
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
69261-50-3
Appearance
White solid powder
Purity
>99.0% HPLC
Methyl 2-(triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White to off white solid
Purity
≥98 %
Methyl 4-(chlorocarbonyl)butanoate
CAS RN
1501-26-4
Appearance
Yellow liquid
Purity
98%GC
1,1'-(Azodicarbonyl)-dipiperidine
CAS RN
10465-81-3
Appearance
Pale yellow to yellow solid
Purity
98% HPLC
CAS RN
775-15-5
Appearance
Pale yellow to colorless transparent liquid
Purity
>98%(GC)
1-Boc-piperidine-2-carboxamide
CAS RN
388077-74-5
Appearance
White or almost white crystalline powder
Purity
97% GC
CAS RN
5415-94-1
Appearance
White solid powder
Purity
97% HNMR
2-Propenoic acid, 3-bromo-2-methyl-, ethyl ester, (2E)-
CAS RN
38104-06-2
Appearance
Colorless to yellowish liquid
Purity
>98% HPLC
4-Amino-2,6-dimethoxypyrimidine
CAS RN
3289-50-7
Appearance
Off white to yellow powder
Purity
≥98% HPLC
5,6,7,8-Tetrahydroquinazolin-4-ol
CAS RN
19178-19-9
Appearance
Off white to white solid 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
CAS RN
477844-84-1
Appearance
White powder
Purity
>98.0% HPLC
CAS RN
5006-62-2
Appearance
Colorless to yellowish liquid
Purity
98% GC
Methyl piperidine-2-carboxylate
CAS RN
41994-45-0
Appearance
Colorless to yellowish liquid
Purity
98% GC
CAS RN
112257-19-9
Appearance
Pale yellow to colorless liquid
Purity
>98% GC, HNMR
CAS RN
111333-97-2
Appearance
Pale yellow to colorless transparent liquid
Purity
99% GC
CAS RN
500-73-2
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
(R)-1-carboxybut-3-en-1-aminium chloride
CAS RN
108412-04-0
Appearance
White crystalline powder
Purity
1,2,3-Tris(tert-butoxycarbonyl)guanidine
CAS RN
216584-22-4
Appearance
Off white to yellowish solid powder
Purity
97% HPLC
CAS RN
118156-93-7
Appearance
Off white powder
Purity
97% 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
2,5-dichloro-N-(2-(isopropylsulfonyl)phenyl)pyrimidin-4-amin...
CAS RN
761440-16-8
Appearance
Off white to white solid powder
Purity
98% HPLC
2-[2-(2-AZIDOETHOXY)ETHOXY]ETHANOL
CAS RN
86520-52-7
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
4-Fluorophenylhydrazine hydrochloride
CAS RN
823-85-8
Appearance
White to off white solid
Purity
98%HPLC
Ethyl 1-Boc-piperidine-3-carboxylate
CAS RN
130250-54-3
Appearance
Light yellow liquid
Purity
98% GC
N-Boc-Bn Tert-butyl n-(benzyloxy)carbamate
CAS RN
79722-21-7
Appearance
White to off white solid
Purity
98%HPLC
Phenolphthalein monophosphate dicyclohexylammonium salt
CAS RN
14815-59-9
Appearance
Purity
≥95%
CAS RN
1452-77-3
Appearance
White crystalline powder
Purity
>98% HPLC
CAS RN
2127-03-9
Appearance
Off white to white crystalline powder
Purity
99%HPLC
TPTZ 2,4,6-Tri(2-pyridyl)-1,3,5-triazine
CAS RN
3682-35-7
Appearance
Pale yellow powder
Purity
99% HPLC
1-cyclopentylhydrazine dihydrochloride
CAS RN
645372-27-6
Appearance
White solid
Purity
>98%
2-Bromo-1H-isoindole-1,3(2H)-dione
CAS RN
5332-26-3
Appearance
Off white to white solid
Purity
98% HPLC
2-Chloro-1,3-bis(dimentylamino)trimethinium...
CAS RN
249561-98-6
Appearance
Off white to white solid
Purity
98.0% HPLC
3,5-dimethyl-pyrazole-1-carboxamidinnitrate
CAS RN
38184-47-3
Appearance
White solid powder
Purity
≥98.0%
4-(Dimethoxy-phosphorylmethyl)-benzoic acid methyl ester
CAS RN
78022-19-2
Appearance
Pale yellow to colorless transparent liquid
Purity
>97% T
4-Hydroxybenzamidine hydrochloride
CAS RN
38148-63-9
Appearance
White to off white powder
Purity
99%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
10576-12-2
Appearance
White to light green solid or colorless to light green transparent liquid
Purity
97% GC
CAS RN
105496-31-9
Appearance
Off-white to white powder
Purity
≥98.0% HPLC
FMPN N,N-Bis(2-Cyanoethyl)Formamide
CAS RN
3445-84-9
Appearance
Pale yellow to colorless transparent liquid
Purity
90%HNMR
CAS RN
3182-95-4
Appearance
White to bright yellow powder
Purity
99.3% HPLC
N,N'-bis(trimethylsilyl)methanediimine
CAS RN
1000-70-0
Appearance
Colorless to yellowish transparent liquid
Purity
98% GC
N,N'-Di-tert-butoxycarbonyl-L-histidine
CAS RN
20866-46-0
Appearance
White solid
Purity
O-(4-Nitrobenzyl)hydroxylamine hydrochloride
CAS RN
2086-26-2
Appearance
Off white to yellowish crystalline powder
Purity
98% HPLC
O-(Tetrahydro-2H-pyran-2-yl)hydroxylamine
CAS RN
6723-30-4
Appearance
White solid or colorless liquid
Purity
98%GC
1,3-Di-Boc-2-(2-hydroxyethyl)guanidine
CAS RN
215050-11-6
Appearance
Off white to yellowish solid powder
Purity
96% HPLC
1-(4-(methylamino)phenyl)ethanone
CAS RN
17687-47-7
Appearance
Pale yellow powder
Purity
97% HPLC
CAS RN
1445-73-4
Appearance
Transparent yellow to orange liquid
Purity
>98% GC
1-[3,5-bis(2-bromoacetyl)-1,3,5-triazinan-1-yl]-2-bromoethan...
CAS RN
92531-02-7
Appearance
White to off-white powder
Purity
≥97.0%
CAS RN
109-85-3
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
4-cyclohexyl-piperazine-1-carboxylic acid tert-butyl ester
CAS RN
1224935-95-8
Appearance
White powder
Purity
97% HPLC
Ethyl 6-bromo-4-hydroxy-3-quinolinecarboxylate
CAS RN
79607-23-1
Appearance
Off white to white solid
Purity
98.0% HPLC
N-(4-Chloro-7H-pyrrolo[2,3-d]pyrimidin-2-yl)-2,2-dimethylpro...
CAS RN
149765-15-1
Appearance
Powder grey crystalline powder
Purity
>98 HPLC
N-Boc-N-methoxy-3-aminopropionic acid
CAS RN
172299-81-9
Appearance
Colorless Transparent Liquid
Purity
98% HNMR
Tert-Butyl N-(tert-butoxycarbonyloxy)carbamate
CAS RN
85006-25-3
Appearance
White powder
Purity
98%GC
CAS RN
617-37-8
Appearance
colorless liquid
Purity
>95.0% H-NMR
1,13-DIAMINO-4,7,10-TRIOXATRIDECANE
CAS RN
4246-51-9
Appearance
Pale yellow to colorless transparent liquid
Purity
97% GC
4-Guanidinobenzoic acid hydrochloride
CAS RN
42823-46-1
Appearance
White crystalline powder
Purity
≥98% HPLC
5-methoxy-2,3,3-trimethylindoline
CAS RN
41382-23-4
Appearance
Yellow liquid
Purity
99,00%
9-Fluorenylmethyl N-hydroxycarbamate
CAS RN
190656-01-0
Appearance
White to off white solid
Purity
98% HPLC
CAS RN
3332-29-4
Appearance
White or yellowish crystals
Purity
98%-103(AT)
Ethyl 2,5-dioxo-2H-pyrrole-1(5H)-carboxylate
CAS RN
55750-49-7
Appearance
Off white to yellowish solid powder
Purity
98%HPLC
L-Alanine isopropyl ester hydrochloride
CAS RN
62062-65-1
Appearance
Off white to white crystalline powder
Purity
98%AT
methyl 2-aminopent-4-enoate hydrogen chloride
CAS RN
115289-55-9
Appearance
Yellow viscous liquid
Purity
>97%
Methyl 6-HydroxypyriMidine-4-carboxylate
CAS RN
7399-93-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
24057-28-1
Appearance
White crystal
Purity
98%HPLC
2,2-dimethyl-N-(4-oxo-1,7-dihydropyrrolo[2,3-d]pyrimidin-2-y...
CAS RN
137281-08-4
Appearance
Yellowish brown solid powder
Purity
>95.0%(HPLC)
2,6-Dihydro-4H-pyrrolo[3,4-c]pyrazole-5-carboxylic acid...
CAS RN
1280210-79-8
Appearance
Light yellow to yellow powder
Purity
≥98% HPLC
2-Fluoro-5-[(3-oxo-1(3H)-isobenzofuranylidene)methyl]-benzon...
CAS RN
763114-25-6
Appearance
Yellow to white powder
Purity
>98% HPLC
CAS RN
13020-57-0
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
amino-hydroxyimino-acetic acid ethyl ester
CAS RN
1217428-98-2
Appearance
White solid
Purity
>98%
Boc-1,3-diaminopropane hydrochloride
CAS RN
127346-48-9
Appearance
White crystalline powder
Purity
98 %-103%(AT)
Methyl 4-(diethylcarbamoyl)benzoate
CAS RN
122357-96-4
Appearance
Pale yellow transparent liquid
Purity
98% HPLC
CAS RN
930-88-1
Appearance
Off white to white powder
Purity
98% HPLC
TATM β-D-Mannopyranose 1,3,4,6-tetra-O-acetate...
CAS RN
92051-23-5
Appearance
Off white to white solid
Purity
98%GC
[2-(4-maleimidophenyl)]acetic acid
CAS RN
91574-45-7
Appearance
Yellow solid
Purity
98% HPLC
1-(4-methoxybenzyl)hydrazine dihydrochloride
CAS RN
412327-07-2
Appearance
Off white to yellowish solid powder
Purity
97% HPLC
CAS RN
26690-80-2
Appearance
Colorless Transparent Liquid
Purity
96% GC
2-methoxy-N,N-dimethylacetamide
CAS RN
4128-76-1
Appearance
Colorless to yellowish liquid
Purity
>97.0% GC
4-(Trifluoromethyl)benzimidamidehydrochloride
CAS RN
38980-96-0
Appearance
White solid
Purity
>98%
4-Bromobenzamidine hydrochloride
CAS RN
55368-42-8
Appearance
Off white to white powder
Purity
99%HPLC
4-nitrophenyl dimethylcarbamate
CAS RN
7244-70-4
Appearance
Off white to light yellow powder
Purity
≥98% HPLC
4-Phenylbenzamidine hydrochloride
CAS RN
111082-23-6
Appearance
Off white to white powder
Purity
98%HPLC
CAS RN
60233-66-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
5617-32-3
Appearance
Colorless to light yellow liquid
Purity
≥98.0%
CAS RN
24566-79-8
Appearance
White to off white solid
Purity
≥98% GC
CAS RN
39546-32-2
Appearance
White or almost white crystalline powder
Purity
98% HPLC
propargyl carbonate N-hydroxysuccinimide ester
CAS RN
484064-96-2
Appearance
Off white to white solid powder
Purity
98% HPLC
CAS RN
3871-20-3
Appearance
Light yellow solid
Purity
≥98% HPLC
N-(Diphenylmethylene)glycine Methyl Ester
CAS RN
81167-39-7
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
2213-63-0
Appearance
Off white to light brown
Purity
98% NMR
2,4,6-trimethylbenzenesulfonyl hydrazide
CAS RN
16182-15-3
Appearance
White off white crystalline powder
Purity
97%AT
CAS RN
889676-37-3
Appearance
Off white to white powder
Purity
≥99.0%HPLC
DL-2-amino-3-phenylpropan-1-ol
CAS RN
16088-07-6
Appearance
White solid powder
Purity
99.6% HPLC
Octadecanedioic acid mono-tert-butyl ester
CAS RN
843666-40-0
Appearance
Off white to white solid powder
Purity
99% T
Pyrazine-2-carboximidamidehydrochloride
CAS RN
138588-41-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
Succinimidyl-[4-(N-maleimidomethyl)]-cyclohexane-1-carboxy-(...
CAS RN
125559-00-4
Appearance
White solid
Purity
>95%
(S)-4-Amino-5-(tert-butoxy)-5-oxopentanoic acid
CAS RN
45120-30-7
Appearance
Off white to white solid powder
Purity
98% HPLC
2-Phenylacetimidamidehydrochloride
CAS RN
2498-46-6
Appearance
White solid
Purity
>97%
4,5,6,7-tetrahydro-1H-benzoimidazole
CAS RN
3752-24-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
1670-14-0
Appearance
White crystalline powder
Purity
≥98.0% HPLC
N-(4-Cyanophenyl)guanidine hydrochloride
CAS RN
373690-68-7
Appearance
White crystal
Purity
98%HPLC
N-(tert-butoxycarbonyl)-2-methyl-1,3-diaminopropane
CAS RN
480452-05-9
Appearance
Colorless or light yellow liquid
Purity
98% GC
TETRAETHYLENE GLYCOL DI-P-TOSYLATE
CAS RN
37860-51-8
Appearance
Off white to white solid
Purity
97% HPLC
11-Maleimidoundecanoic Acid Sulfo-N-Succinimidyl Ester
CAS RN
211236-68-9
Appearance
White to off white solid
Purity
>95% H-NMR
CAS RN
156-41-2
Appearance
Transparent almost colorless liquid
Purity
>97% T
1-(6-Aminohexyl)-1H-pyrrole-2,5-dione 2,2,2-trifluoroacetate
CAS RN
731862-92-3
Appearance
White solid
Purity
99,70%
CAS RN
697-73-4
Appearance
Pale yellow to colorless liquid or solid
Purity
99%
4-Amidinobenzamide hydrochloride
CAS RN
59855-11-7
Appearance
White solid powder
Purity
98% HPLC
4-Methylbenzene-1-carboximidamide hydrochloride
CAS RN
6326-27-8
Appearance
White powder
Purity
98% HPLC
CAS RN
7597-56-0
Appearance
White solid
Purity
HNMR qualified
CAS RN
68076-36-8
Appearance
Colorless to yellowish liquid
Purity
97% GC
N-tert-butoxycarbonyl-2-amino-2-methyl-1-propanol
CAS RN
102520-97-8
Appearance
crystal
Purity
98% GC
CAS RN
1703794-73-3
Appearance
Off white to white solid powder
Purity
>97% T
[(TERT-BUTOXY)CARBONYL]AMINO 2,2-DIMETHYLPROPANOATE
CAS RN
35657-40-0
Appearance
White solid
Purity
>98% HNMR
1-(4-nitrophenyl)sulfonylpiperidin-4-one
CAS RN
924869-20-5
Appearance
Pale yellow solid
Purity
>98%(HPLC)
1-Boc-3-cyano-4-oxopyrrolidine
CAS RN
175463-32-8
Appearance
Off-white to white powder
Purity
≥98.0% HPLC
CAS RN
124072-61-3
Appearance
Off white to white solid powder
Purity
98.0%(T)
Ethyl 6-bromo-4-hydroxyquinoline-3-carboxylate
CAS RN
122794-99-4
Appearance
Pale yellow to off white powder
Purity
97% NMR
CAS RN
89180-61-0
Appearance
Pale yellow to colorless transparent liquid
Purity
97% HPLC
CAS RN
146651-71-0
Appearance
Off white to white solid powder
Purity
>97% HPLC
O-Acetyl-N-tert-butylhydroxylamine Hydrochloride
CAS RN
851074-40-3
Appearance
White crystalline powder
Purity
98%-103%(T); 97% HPLC
1,1,1-Trimethoxy-2-chloroethane
CAS RN
74974-54-2
Appearance
Pale yellow to colorless transparent liquid
Purity
98.8%(GC)
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