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
N-(tert-Butoxycarbonyl)-1,2-phenylenediamine
CAS RN
146651-75-4
Appearance
Orange solid
Purity
98% HPLC
Ethyl 1-Boc-piperidine-2-carboxylate
CAS RN
362703-48-8
Appearance
Light yellow to yellow viscous liquid
Purity
98% GC
4-Nitrobenzamidine, hydrochloride
CAS RN
15723-90-7
Appearance
Pale yellow crystalline powder
Purity
98%HPLC
EOPC Ethyl N-Boc-4-Oxopyrrolidine-3-carboxylate
CAS RN
146256-98-6
Appearance
Off white solid
Purity
98% HPLC
3-Trifluoromethylbenzamidine hydrochloride
CAS RN
62980-03-4
Appearance
White powder
Purity
98%HPLC
Methyl 4-aminobutyrate hydrochloride
CAS RN
13031-60-2
Appearance
White solid
Purity
≥98%(AT)
Phenolphthalein monophosphate dicyclohexylammonium salt
CAS RN
14815-59-9
Appearance
Purity
≥95%
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
CAS RN
98968-72-0
Appearance
White to yellowish powder
Purity
98% GC
1,4-Benzodioxane-2-carboxylic acid
CAS RN
3663-80-7
Appearance
White to off-white powder
Purity
≥98% GC
N-Cbz-PTE Benzyloxycarbonyl-alpha-phosphonoglycine trimethyl...
CAS RN
88568-95-0
Appearance
White to off white solid
Purity
98% HPLC
CAS RN
27687-14-5
Appearance
White or light yellow crystalline powder
Purity
98% GC
3-(2-pyridyldithio)propionic acid n-hydroxy-succinimide...
CAS RN
68181-179
Appearance
Off white to white solid powder
Purity
98% HPLC
CAS RN
6065-82-3
Appearance
Pale yellow to colorless liquid
Purity
>98% GC,HNMR
4-Methoxyphenylhydrazine hydrochloride
CAS RN
19501-58-7
Appearance
Off white powder
Purity
97%HPLC
CAS RN
21871-47-6
Appearance
White to off-white powder
Purity
≥98% HPLC
SucciniMidyl 1-Pyrenebutanoate
CAS RN
114932-60-4
Appearance
Earthy yellow powder
Purity
98% HPLC
Benzyl 1-methylhydrazinecarboxylate
CAS RN
37519-04-3
Appearance
Colorless to pale yellow transparent liquid
Purity
≥97.0%
4,6-Dihydro-1H-pyrrolo[3,4-c]pyrazole-5-carboxylic acid...
CAS RN
657428-42-7
Appearance
Pale yellow to orange powder
Purity
98% HPLC
CAS RN
328086-60-8
Appearance
Off white to white solid powder
Purity
>98.5% HPLC
CAS RN
5329-33-9
Appearance
Off-white to white powder
Purity
≥98.0%
CAS RN
17616-03-4
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0% GC
4-chloro-5-iodo-7-methyl-7H-pyrrolo[2,3-d]pyrimidine
CAS RN
833481-37-1
Appearance
Off white powder solid
Purity
98.2% HPLC
N-methoxy-N-methyl-2-[(2-methylpropan-2-yl)oxy]acetamide
CAS RN
1268252-59-0
Appearance
Pale yellow to colorless transparent liquid
Purity
98% GC
CAS RN
3026-63-9
Appearance
Off white to white powder
Purity
4-Guanidinobenzoic acid hydrochloride
CAS RN
42823-46-1
Appearance
White crystalline powder
Purity
≥98% HPLC
METHYL 2,2,2-TRICHLOROACETIMIDATE
CAS RN
2533-69-9
Appearance
Colorless Transparent Liquid
Purity
97%(GC)
CAS RN
24566-79-8
Appearance
White to off white solid
Purity
≥98% GC
Ethyl N-Cbz-4-Oxopyrrolidine-3-carboxylate
CAS RN
51814-19-8
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
3589-41-1
Appearance
White to off-white crystalline powder
Purity
≥98.0%
4-Methoxybenzamidine hydrochloride
CAS RN
51721-68-7
Appearance
White powder
Purity
99%HPLC
1-Boc-3-hydroxymethylpyrrolidine
CAS RN
114214-69-6
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
CAS RN
24807-55-4
Appearance
White to yellowish crystalline powder
Purity
98% HPLC
6-Bromonicotinic acid ethyl ester
CAS RN
132334-98-6
Appearance
Pale yellow transparent liquid or solid
Purity
98%GC
Ethyl 1-Boc-3-pyrrolidinecarboxylate
CAS RN
170844-49-2
Appearance
Colorless to yellowish liquid
Purity
>97%
FMPN N,N-Bis(2-Cyanoethyl)Formamide
CAS RN
3445-84-9
Appearance
Pale yellow to colorless transparent liquid
Purity
90%HNMR
Tert-Butyl (2-hydroxyethyl)(methyl)carbamate
CAS RN
57561-39-4
Appearance
colorless liquid
Purity
99% GC
2-acetamido-3-(3-bromophenyl)propanoic acid
CAS RN
1266723-48-1
Appearance
White solid
Purity
99% HPLC
CAS RN
2353-44-8
Appearance
Blue solid
Purity
HNMR qualified
amino-hydroxyimino-acetic acid ethyl ester
CAS RN
1217428-98-2
Appearance
White solid
Purity
>98%
Cyclohexylhydrazine hydrochloride
CAS RN
24214-73-1
Appearance
White crystal
Purity
99% T
N,N'-Di-tert-butoxycarbonyl-L-histidine
CAS RN
20866-46-0
Appearance
White solid
Purity
N-boc-ethylenediamine hydrochloride
CAS RN
79513-35-2
Appearance
White powder
Purity
98 %-103%(AT)
CAS RN
60233-66-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
Ethyl 3-bromobenzenecarboximidoate hydrochloride
CAS RN
57508-63-1
Appearance
White solid
Purity
Methyl 6-HydroxypyriMidine-4-carboxylate
CAS RN
7399-93-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
N,N-Dibenzylglycine ethyl ester
CAS RN
77385-90-1
Appearance
Off white to white crystalline powder
Purity
99% HPLC
N-(Benzyloxycarbonyl)-2-aminoacetonitrile
CAS RN
3589-41-1
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
CAS RN
24057-28-1
Appearance
White crystal
Purity
98%HPLC
1-(Diphenylmethyl)-3-azetidinyl methanesulfonate
CAS RN
33301-41-6
Appearance
White solid
Purity
>98% HPLC
6-maleimidohexanoic acid pentafluorophenyl ester
CAS RN
692739-25-6
Appearance
White solid
Purity
99,60%
benzamidine hydrochloride dihydrate
CAS RN
74222-83-6
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
CAS RN
7689-50-1
Appearance
White crystalline powder
Purity
98%HPLC
CAS RN
26218-78-0
Appearance
White to off white solid
Purity
97%HPLC
1-(Diphenylmethyl)-3-hydroxyazetidine
CAS RN
18621-17-5
Appearance
White solid
Purity
>98% HPLC
1-[4-(2-AZEPAN-1-YL-ETHOXY)-BENZYL]-5-BENZYLOXY-2-(4-BENZYLO...
CAS RN
198480-21-6
Appearance
Purity
≥98%
2-Bromo-1,3,5-triisopropylbenzene
CAS RN
21524-34-5
Appearance
Colorless to yellowish liquid
Purity
97% GC
Dabcyl-Osu 4-[4-(Dimethylamino)phenylazo]benzoic acid...
CAS RN
146998-31-4
Appearance
Red powder
Purity
97%HPLC
N-Benzylhydroxylamine hydrochloride
CAS RN
29601-98-7
Appearance
White crystalline powder
Purity
98%HPLC
N-[Tris(hydroxymethyl)methyl]acrylamide
CAS RN
13880-05-2
Appearance
White crystal
Purity
>98% HPLC
[Bis(trifluoroacetoxy)iodo]benzene
CAS RN
2712-78-9
Appearance
White crystalline powder
Purity
98%HPLC
2-Bromo-1H-isoindole-1,3(2H)-dione
CAS RN
5332-26-3
Appearance
Off white to white solid
Purity
98% HPLC
CAS RN
5415-94-1
Appearance
White solid powder
Purity
97% HNMR
3-Amino-3-iminopropanoic acid ethyl ester hydrochloride
CAS RN
57508-48-2
Appearance
Off white to white solid powder
Purity
>97%
1-Boc-4-[methoxy(methyl)carbamoyl]piperidine
CAS RN
139290-70-3
Appearance
White solid
Purity
98.7% HPLC
1H-Benzotriazole-5-carboxylic acid
CAS RN
60932-58-3
Appearance
Pale pink to pinkish-red powder
Purity
≥98.0%
2-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)ethanesulfonic acid...
CAS RN
81428-07-1
Appearance
White solid powder
Purity
>98% HPLC
2-amino-N-benzylacetamide hydrochloride
CAS RN
20432-97-7
Appearance
White crystalline powder
Purity
98-103% T
2-tert-butyl-1,1,3,3-tetramethyl-guanidine
CAS RN
29166-72-1
Appearance
Pale yellow to colorless transparent liquid
Purity
97%GC
Ethyl N-Boc-piperidine-4-carboxylate
CAS RN
142851-03-4
Appearance
Light yellow liquid
Purity
97% GC
propargyl carbonate N-hydroxysuccinimide ester
CAS RN
484064-96-2
Appearance
Off white to white solid powder
Purity
98% HPLC
[(TERT-BUTOXY)CARBONYL]AMINO 2,2-DIMETHYLPROPANOATE
CAS RN
35657-40-0
Appearance
White solid
Purity
>98% HNMR
(4-Carboxybutyl)triphenylphosphonium bromide
CAS RN
17814-85-6
Appearance
White to off white solid
Purity
98% HPLC
CAS RN
1000806-59-6
Appearance
Colorless to pale yellow viscous liquid
Purity
≥98.0%
CAS RN
118156-93-7
Appearance
Off white powder
Purity
97% HPLC
2-Phenylacetimidamidehydrochloride
CAS RN
2498-46-6
Appearance
White solid
Purity
>97%
3-Fluorobenzamidine hydrochloride
CAS RN
75207-72-6
Appearance
White powder
Purity
98% HPLC
4-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)benzoic acid
CAS RN
17057-04-4
Appearance
Pale yellow powder
Purity
98% HPLC
4-AMIDINOPYRIDINE HYDROCHLORIDEPYRIDINE-4-CARBOXIMIDAMIDE...
CAS RN
6345-27-3
Appearance
White crystalline powder
Purity
>97% T
Methyl Pentafluorophenyl Carbonate
CAS RN
36919-03-6
Appearance
White crystalline solid or colorless liquid
Purity
98%HPLC
N-[(Trimethylsilyl)methyl]benzylamine
CAS RN
53215-95-5
Appearance
colorless or light yellow liquid
Purity
≥98.0%
6-Chloropyrimidine-2,4-diamine
CAS RN
156-83-2
Appearance
Off white solid powder
Purity
98%
1-(Cyanomethyl)piperidinium TetrafluoroborateTetramethyl...
CAS RN
434937-12-9
Appearance
Purity
CAS RN
693-05-0
Appearance
Light yellow solid
Purity
98% GC
4-nitrophenyl dimethylcarbamate
CAS RN
7244-70-4
Appearance
Off white to light yellow powder
Purity
≥98% HPLC
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
Ethyl 1,3-dimethylpyrazole-5-carboxylate
CAS RN
5744-40-1
Appearance
Pale yellow transparent liquid
Purity
98%GC
Ethyl 1-Benzylpyrrolidine-3-carboxylate
CAS RN
5747-92-2
Appearance
Pale yellow to colorless transparent liquid
Purity
97% GC
Ethyl 2-[(diphenylmethylene)amino]-2-ethylbutanoate
CAS RN
189631-94-5
Appearance
Purity
CAS RN
50595-15-8
Appearance
Colorless Transparent Liquid
Purity
97%GC
CAS RN
929-59-9
Appearance
Pale yellow clear liquid
Purity
>97% T
CAS RN
14273-92-8
Appearance
Colorless Transparent Liquid
Purity
97.4% GC
CAS RN
617-37-8
Appearance
colorless liquid
Purity
>95.0% H-NMR
4-(1-Acetylpiperazin-4-yl)phenol
CAS RN
67914-60-7
Appearance
Off white solid
Purity
>97% T
Isopropylhydrazine hydrochloride
CAS RN
16726-41-3
Appearance
White powder
Purity
99%AT
(2S)-2-(Methoxycarbonyl)pyrrolidin-1-ium chloride
CAS RN
2133-40-6
Appearance
White to off white microcrystalline powder
Purity
≥98%
1-Boc-piperidine-4-carboxamide
CAS RN
91419-48-6
Appearance
White or light yellow powder
Purity
97% HPLC
2-Chloro-1,3-bis(dimentylamino)trimethinium...
CAS RN
249561-98-6
Appearance
Off white to white solid
Purity
98.0% HPLC
2-Chloro-1-(4-methoxyphenyl)ethanone
CAS RN
2196-99-8
Appearance
Quasi white crystalline powder
Purity
99%HPLC
2-Methylpropylhydrazine hydrochloride
CAS RN
237064-47-0
Appearance
White solid
Purity
98%-103% T
1-Ethyl-3-methylimidazolium P-toluenesulfonate
CAS RN
328090-25-1
Appearance
Off white to white powder
Purity
98%AT
4-Bromophenylhydrazine hydrochloride
CAS RN
622-88-8
Appearance
White to off white solid
Purity
98%HPLC
Methyl piperidine-3-carboxylate
CAS RN
50585-89-2
Appearance
Pale yellow liquid
Purity
98% GC
O-(Tetrahydro-2H-pyran-2-yl)hydroxylamine
CAS RN
6723-30-4
Appearance
White solid or colorless liquid
Purity
98%GC
CAS RN
101930-07-8
Appearance
Transparent to yellowish liquid
Purity
97% HPLC
CAS RN
945381-56-6
Appearance
Off white to grey solid
Purity
98.5% HPLC
1-(Tetrahydro-2H-pyran-2-yl)-1H-pyrazole
CAS RN
449758-17-2
Appearance
Colorless Transparent Liquid
Purity
>95% GC
2,4,6-triisopropylbenzenesulfonyl hydrazide
CAS RN
39085-59-1
Appearance
White crystal
Purity
97%HPLC
3-Amino-4-pyrazolecarbonitrile
CAS RN
16617-46-2
Appearance
White to almost white or light yellow solid
Purity
≥98% HPLC
CAS RN
15115-60-3
Appearance
White to off white solid
Purity
≥ 98%HPLC
(Trifluoroacetyl)benzotriazole (1H,2H-isomer mixture)
CAS RN
183266-61-7
Appearance
Off white solid
Purity
99,90%
1-N-ethoxycarbonyl-3-pyrrolidone
CAS RN
14891-10-2
Appearance
Pale yellow to colorless transparent liquid
Purity
≥98%
2-(bis(2-hydroxyethyl)amino)acetic acid
CAS RN
150-25-4
Appearance
Off white solid
Purity
2-Bromopyridine-5-carbaldehyde
CAS RN
149806-06-4
Appearance
Off white to yellow powder
Purity
98% HPLC
CAS RN
69491-64-1
Appearance
White to off-white powder
Purity
≥98.0%
1-(2,3-Dihydro-1,4-benzodioxin-2-ylcarbonyl)piperazine...
CAS RN
70918-74-0
Appearance
White to almost white solid
Purity
≥97.0%
CAS RN
18704-37-5
Appearance
Off white or white crystals
Purity
98%HPLC
CAS RN
477844-84-1
Appearance
White powder
Purity
>98.0% HPLC
(S)-(+)-2,2-Dimethyl-1,3-dioxolane-4-methanol
CAS RN
22323-82-6
Appearance
Colorless Transparent Liquid
Purity
98% GC
1-Benzylpyrrolidin-3-one,hydrochloride
CAS RN
1012-01-7
Appearance
Off white to off white powder
Purity
>98%(HPLC)
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
36476-84-3
Appearance
White solid
Purity
>98% HPLC
2-Chloro-N-methoxy-N-methylacetamide
CAS RN
67442-07-3
Appearance
White crystal powder to almost white crystal powder
Purity
>98% GC
CAS RN
623-05-2
Appearance
White crystalline powder
Purity
≥99%HPLC
CAS RN
16499-56-2
Appearance
Off white to white solid powder
Purity
>98% HPLC
(R)-1-carboxybut-3-en-1-aminium chloride
CAS RN
108412-04-0
Appearance
White crystalline powder
Purity
1-(Tert-butoxycarbonyl)-2-pyrrolidinone
CAS RN
85909-08-6
Appearance
Yellowish to colorless solid crystal
Purity
≥98%
2-Chloropyridine-5-carbaldehyde
CAS RN
23100-12-1
Appearance
Off white to white solid
Purity
98% HPLC
5,8,11-Trioxa-2-azatridecanoicacid, 13-amino-,...
CAS RN
101187-40-0
Appearance
Colorless Transparent Liquid
Purity
97% HNMR
4-(Trifluoromethyl)benzimidamidehydrochloride
CAS RN
38980-96-0
Appearance
White solid
Purity
>98%
Pyrrolidin-3-one hydrochloride
CAS RN
3760-52-9
Appearance
Off white powder
Purity
97% NMR
(3aR,4S,7R,7aS) 4,7-Methano-1H-isoindole-1,3(2H)-dione
CAS RN
14805-29-9
Appearance
Purity
≥98%
4-Acetamidobenzenesulfonyl azide
CAS RN
2158-14-7
Appearance
White or off white crystal
Purity
≥98%
t-Boc-aminooxyacetic Acid N-Hydroxysuccinimide Ester
CAS RN
80366-85-4
Appearance
White crystal
Purity
98% HPLC
1,1,1-Trimethoxy-2-chloroethane
CAS RN
74974-54-2
Appearance
Pale yellow to colorless transparent liquid
Purity
98.8%(GC)
CAS RN
7154-73-6
Appearance
Transparent colorless liquid
Purity
>97% T
1-(9H-FUOREN-9-YL)-3-OXO-2,7,10-TRIOXA-4-AZADODECAN-12-OIC...
CAS RN
166108-71-0
Appearance
Purity
1-methyl-piperidine-2-carboxylicacidmethylester
CAS RN
1690-74-0
Appearance
Light yellow liquid
Purity
98% GC
CAS RN
52898-32-5
Appearance
White to off white solid
Purity
≥98% HPLC
Glycine,N-(2-aminoethyl)-,ethyl ester chloride
CAS RN
24123-13-5
Appearance
Off white to white solid powder
Purity
>98% T
N-(Diphenylmethylene)glycine Methyl Ester
CAS RN
81167-39-7
Appearance
Off white to white powder
Purity
98% HPLC
O-Pivaloylhydroxylammonium Trifluoromethanesulfonate
CAS RN
1293990-73-4
Appearance
Pale yellow to off white solid
Purity
≥98% T
CAS RN
41239-10-5
Appearance
Colorless to light yellow liquid
Purity
≥97.0%
1-Ethyl-3-methylimidazolium ethylsulfate
CAS RN
342573-75-5
Appearance
White to off white solid
Purity
98% HPLC
5-Hydroxypentanoic Acid SodiuM Salt
CAS RN
37435-69-1
Appearance
White solid
Purity
>97% HNMR
CAS RN
72648-80-7
Appearance
Light yellow to colorless transparent liquid or light yellow to white solid
Purity
98% GC
O-diphenylphosphinylhydroxylamine
CAS RN
72804-96-7
Appearance
White powder
Purity
90% HPLC
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