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.
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
4-Aminobenzamidine dihydrochloride
CAS RN
2498-50-2
Appearance
White powder
Purity
98%HPLC
2-(3-CHLOROPROPYL)-2,5,5-TRIMETHYL-[1,3]-DIOXANE
CAS RN
88128-57-8
Appearance
Purity
≥98%
ACETYLPHOSPHONIC ACID DIETHYL ESTER
CAS RN
919-19-7
Appearance
colorless liquid
Purity
≥97% GC
SucciniMidyl 1-Pyrenebutanoate
CAS RN
114932-60-4
Appearance
Earthy yellow powder
Purity
98% HPLC
TPTZ 2,4,6-Tri(2-pyridyl)-1,3,5-triazine
CAS RN
3682-35-7
Appearance
Pale yellow powder
Purity
99% HPLC
2,4,6-trimethylbenzenesulfonyl hydrazide
CAS RN
16182-15-3
Appearance
White off white crystalline powder
Purity
97%AT
3-(TRIFLUOROMETHYL)PYRAZOLE-4-CARBOXYLIC ACID ETHYL ESTER
CAS RN
155377-19-8
Appearance
Pale yellow to yellow solid
Purity
98.0%(HPLC)
CAS RN
85908-96-9
Appearance
Colorless to yellowish liquid or white crystal
Purity
>98% HPLC
1,13-DIAMINO-4,7,10-TRIOXATRIDECANE
CAS RN
4246-51-9
Appearance
Pale yellow to colorless transparent liquid
Purity
97% GC
1-(4-methoxybenzyl)hydrazine dihydrochloride
CAS RN
412327-07-2
Appearance
Off white to yellowish solid powder
Purity
97% HPLC
1-Boc-piperidine-2-carboxamide
CAS RN
388077-74-5
Appearance
White or almost white crystalline powder
Purity
97% GC
CAS RN
697-73-4
Appearance
Pale yellow to colorless liquid or solid
Purity
99%
4-(Trifluoromethyl)benzimidamidehydrochloride
CAS RN
38980-96-0
Appearance
White solid
Purity
>98%
Ethyl 1-Boc-piperidine-2-carboxylate
CAS RN
362703-48-8
Appearance
Light yellow to yellow viscous liquid
Purity
98% GC
CAS RN
10576-12-2
Appearance
White to light green solid or colorless to light green transparent liquid
Purity
97% GC
Glycine methyl ester hydrochloride
CAS RN
5680-79-5
Appearance
White crystalline powder
Purity
98% AT
Methyl 4-(chlorocarbonyl)butanoate
CAS RN
1501-26-4
Appearance
Yellow liquid
Purity
98%GC
2-Thiazolecarboxamidine Hydrochloride
CAS RN
247037-82-7
Appearance
Off white to white solid powder
Purity
>99% HPLC
amino-hydroxyimino-acetic acid ethyl ester
CAS RN
1217428-98-2
Appearance
White solid
Purity
>98%
N-Boc-Bn Tert-butyl n-(benzyloxy)carbamate
CAS RN
79722-21-7
Appearance
White to off white solid
Purity
98%HPLC
Triphenyl(2-pyridylmethyl)phosphonium chloride hydrochloride
CAS RN
99662-46-1
Appearance
Off-white to white powder
Purity
Titration: 102.3%
[2-(4-maleimidophenyl)]acetic acid
CAS RN
91574-45-7
Appearance
Yellow solid
Purity
98% HPLC
BEAZ Bis(2,2,2-trichloroethyl) azodicarboxylate
CAS RN
38857-88-4
Appearance
Yellow crystalline powder
Purity
≥98%HPLC
CAS RN
54247-27-7
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
11-Maleimidoundecanoic Acid Sulfo-N-Succinimidyl Ester
CAS RN
211236-68-9
Appearance
White to off white solid
Purity
>95% H-NMR
2-[2-(2-AZIDOETHOXY)ETHOXY]ETHANOL
CAS RN
86520-52-7
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
CAS RN
889676-37-3
Appearance
Off white to white powder
Purity
≥99.0%HPLC
CAS RN
1013-88-3
Appearance
Colorless to yellowish liquid
Purity
98% GC
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
L-Alanine isopropyl ester hydrochloride
CAS RN
62062-65-1
Appearance
Off white to white crystalline powder
Purity
98%AT
CAS RN
5117-19-1
Appearance
Pale yellow liquid or white solid
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)
4-cyclohexyl-piperazine-1-carboxylic acid tert-butyl ester
CAS RN
1224935-95-8
Appearance
White powder
Purity
97% 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
930-88-1
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
29897-82-3
Appearance
Colorless to yellowish liquid
Purity
>98%
1-Ethyl-1-methylpyrrolidinium bromide
CAS RN
69227-51-6
Appearance
Pale yellow solid powder
Purity
>97.0%(T)
4-Phenylbenzamidine hydrochloride
CAS RN
111082-23-6
Appearance
Off white to white powder
Purity
98%HPLC
5,8,11-Trioxa-2-azatridecanoicacid, 13-amino-,...
CAS RN
101187-40-0
Appearance
Colorless Transparent Liquid
Purity
97% HNMR
Ethyl 1,3-dimethylpyrazole-5-carboxylate
CAS RN
5744-40-1
Appearance
Pale yellow transparent liquid
Purity
98%GC
Isopropylhydrazine hydrochloride
CAS RN
16726-41-3
Appearance
White powder
Purity
99%AT
CAS RN
3182-95-4
Appearance
White to bright yellow powder
Purity
99.3% 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
68076-36-8
Appearance
Colorless to yellowish liquid
Purity
97% GC
CAS RN
39546-32-2
Appearance
White or almost white crystalline powder
Purity
98% HPLC
CAS RN
24057-28-1
Appearance
White crystal
Purity
98%HPLC
CAS RN
1703794-73-3
Appearance
Off white to white solid powder
Purity
>97% T
TETRAETHYLENE GLYCOL DI-P-TOSYLATE
CAS RN
37860-51-8
Appearance
Off white to white solid
Purity
97% 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-Ethoxybenzamidine hydrochloride
CAS RN
18637-00-8
Appearance
White to off white powder
Purity
98% HPLC
CAS RN
87276-51-5
Appearance
Off white to yellowish powder
Purity
>99.0%
CAS RN
89102-73-8
Appearance
Pale yellow to colorless transparent liquid
Purity
97% HPLC
Methyl 1-Boc-piperidine-4-carboxylate
CAS RN
124443-68-1
Appearance
Light yellow liquid
Purity
98% GC
methyl 2-((tert-butoxycarbonyl)oxy)acetate
CAS RN
878395-91-6
Appearance
colorless liquid
Purity
99% GC
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
156-41-2
Appearance
Transparent almost colorless liquid
Purity
>97% T
Phenolphthalein monophosphate dicyclohexylammonium salt
CAS RN
14815-59-9
Appearance
Purity
≥95%
Succinimidyl-[4-(N-maleimidomethyl)]-cyclohexane-1-carboxy-(...
CAS RN
125559-00-4
Appearance
White solid
Purity
>95%
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
1-(6-Aminohexyl)-1H-pyrrole-2,5-dione 2,2,2-trifluoroacetate
CAS RN
731862-92-3
Appearance
White solid
Purity
99,70%
2-methoxy-N,N-dimethylacetamide
CAS RN
4128-76-1
Appearance
Colorless to yellowish liquid
Purity
>97.0% GC
2-Phenylacetimidamidehydrochloride
CAS RN
2498-46-6
Appearance
White solid
Purity
>97%
CAS RN
404586-94-3
Appearance
White solid
Purity
Nuclear magnetic resonance qualified
CAS RN
56657-76-2
Appearance
Off white to white solid
Purity
>98%
CAS RN
7597-56-0
Appearance
White solid
Purity
HNMR qualified
Methyl Pentafluorophenyl Carbonate
CAS RN
36919-03-6
Appearance
White crystalline solid or colorless liquid
Purity
98%HPLC
CAS RN
72648-80-7
Appearance
Light yellow to colorless transparent liquid or light yellow to white solid
Purity
98% GC
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
N-Isopropylhydroxylamine hydrochloride
CAS RN
50632-53-6
Appearance
White crystalline powder
Purity
97%AT
CAS RN
5806-90-6
Appearance
Pale yellow to colorless liquid
Purity
>95%(GC, HNMR)
N-[(Trimethylsilyl)methyl]benzylamine
CAS RN
53215-95-5
Appearance
colorless or light yellow liquid
Purity
≥98.0%
O-(Tetrahydro-2H-pyran-2-yl)hydroxylamine
CAS RN
6723-30-4
Appearance
White solid or colorless liquid
Purity
98%GC
1-(4-nitrophenyl)sulfonylpiperidin-4-one
CAS RN
924869-20-5
Appearance
Pale yellow solid
Purity
>98%(HPLC)
1-Boc-piperidine-3-carboxamide
CAS RN
91419-49-7
Appearance
White or light yellow powder
Purity
97% HPLC
1-Chloroethyl (4-nitrophenyl) carbonate
CAS RN
101623-69-2
Appearance
Off white powder
Purity
99% 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%
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
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
Pyrazine-2-carboximidamidehydrochloride
CAS RN
138588-41-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
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
26690-80-2
Appearance
Colorless Transparent Liquid
Purity
96% GC
3-Amino-3-iminopropanoic acid ethyl ester hydrochloride
CAS RN
57508-48-2
Appearance
Off white to white solid powder
Purity
>97%
3-Phenyl-1H-pyrazole-4-carbaldehyde
CAS RN
26033-20-5
Appearance
White to yellow powder
Purity
98% HPLC
4-(1-Acetylpiperazin-4-yl)phenol
CAS RN
67914-60-7
Appearance
Off white solid
Purity
>97% T
4-Amidinobenzamide hydrochloride
CAS RN
59855-11-7
Appearance
White solid powder
Purity
98% HPLC
4-AMIDINOPYRIDINE HYDROCHLORIDEPYRIDINE-4-CARBOXIMIDAMIDE...
CAS RN
6345-27-3
Appearance
White crystalline powder
Purity
>97% T
CAS RN
584-13-4
Appearance
White crystalline powder
Purity
98%HPLC
4-Guanidinobenzoic acid hydrochloride
CAS RN
42823-46-1
Appearance
White crystalline powder
Purity
≥98% HPLC
4-Hydroxybenzamidine hydrochloride
CAS RN
38148-63-9
Appearance
White to off white powder
Purity
99%HPLC
CAS RN
60233-66-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
33545-98-1
Appearance
White powder
Purity
97%-102%(AT)
Ethyl 1-Boc-3-pyrrolidinecarboxylate
CAS RN
170844-49-2
Appearance
Colorless to yellowish liquid
Purity
>97%
Ethyl 2,5-dioxo-2H-pyrrole-1(5H)-carboxylate
CAS RN
55750-49-7
Appearance
Off white to yellowish solid powder
Purity
98%HPLC
CAS RN
105496-31-9
Appearance
Off-white to white powder
Purity
≥98.0% HPLC
Glycine,N-(2-aminoethyl)-,ethyl ester chloride
CAS RN
24123-13-5
Appearance
Off white to white solid powder
Purity
>98% T
CAS RN
5617-32-3
Appearance
Colorless to light yellow liquid
Purity
≥98.0%
CAS RN
593-56-6
Appearance
White or yellowish crystals
Purity
98%-103(AT)
Methyl (triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White powder
Purity
99.2% HPLC
O-(4-Nitrobenzyl)hydroxylamine hydrochloride
CAS RN
2086-26-2
Appearance
Off white to yellowish crystalline powder
Purity
98% HPLC
CAS RN
500-73-2
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
propargyl carbonate N-hydroxysuccinimide ester
CAS RN
484064-96-2
Appearance
Off white to white solid powder
Purity
98% HPLC
Sulfo-N-succinimidyl 4-maleimidobutyrate sodium salt
CAS RN
185332-92-7
Appearance
White to off-white powder
Purity
>95% H-NMR
1,3-Bis(tert-butoxycarbonyl)guanidine
CAS RN
154476-57-0
Appearance
Off-white to light yellow solid powder
Purity
98% HPLC
CAS RN
775-15-5
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(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
89797-68-2
Appearance
White crystalline powder
Purity
98%HPLC
Biotinamidohexanoyl-6-aminohexanoic acid...
CAS RN
89889-52-1
Appearance
White solid
Purity
>95%
DL-2-amino-3-phenylpropan-1-ol
CAS RN
16088-07-6
Appearance
White solid powder
Purity
99.6% HPLC
Ethyl 6-bromo-4-hydroxy-3-quinolinecarboxylate
CAS RN
79607-23-1
Appearance
Off white to white solid
Purity
98.0% HPLC
CAS RN
14273-92-8
Appearance
Colorless Transparent Liquid
Purity
97.4% GC
CAS RN
89-91-8
Appearance
Colorless Transparent Liquid
Purity
98% GC
N-(TERT-BUTYL)-2-CHLOROACETAMIDE
CAS RN
15678-99-6
Appearance
White to almost white crystalline powder
Purity
≥98% HPLC
CAS RN
1452-77-3
Appearance
White crystalline 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
(S)-4-Amino-5-(tert-butoxy)-5-oxopentanoic acid
CAS RN
45120-30-7
Appearance
Off white to white solid powder
Purity
98% HPLC
1-cyclopentylhydrazine dihydrochloride
CAS RN
645372-27-6
Appearance
White solid
Purity
>98%
2-(2-bromoethyl)isoindoline-1,3-dione
CAS RN
574-98-1
Appearance
White to off white solid
Purity
>98%
2-(carbamoylmethylamino)ethanesulfonic acid
CAS RN
7365-82-4
Appearance
White to off white powder
Purity
>97.0%
2-Bromo-1H-isoindole-1,3(2H)-dione
CAS RN
5332-26-3
Appearance
Off white to 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
693-05-0
Appearance
Light yellow solid
Purity
98% GC
5-methoxy-2,3,3-trimethylindoline
CAS RN
41382-23-4
Appearance
Yellow liquid
Purity
99,00%
CAS RN
18704-37-5
Appearance
Off white or white crystals
Purity
98%HPLC
9-Fluorenylmethyl N-hydroxycarbamate
CAS RN
190656-01-0
Appearance
White to off white solid
Purity
98% HPLC
FMPN N,N-Bis(2-Cyanoethyl)Formamide
CAS RN
3445-84-9
Appearance
Pale yellow to colorless transparent liquid
Purity
90%HNMR
Methyl 2-(triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White to off white solid
Purity
≥98 %
N-(4-Cyanophenyl)guanidine hydrochloride
CAS RN
373690-68-7
Appearance
White crystal
Purity
98%HPLC
CAS RN
24566-79-8
Appearance
White to off white solid
Purity
≥98% GC
CAS RN
1971-49-9
Appearance
White to off white solid
Purity
≥98% HPLC
CAS RN
57260-73-8
Appearance
Colorless Transparent Liquid
Purity
98%GC
Tert-butyl n,n-bis(2-hydroxyethyl)carbamate
CAS RN
103898-11-9
Appearance
Pale yellow transparent liquid
Purity
97% HNMR
CAS RN
27687-14-5
Appearance
White or light yellow crystalline powder
Purity
98% GC
CAS RN
3871-20-3
Appearance
Light yellow solid
Purity
≥98% HPLC
[(TERT-BUTOXY)CARBONYL]AMINO 2,2-DIMETHYLPROPANOATE
CAS RN
35657-40-0
Appearance
White solid
Purity
>98% HNMR
(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
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)
1-Boc-3-cyano-4-oxopyrrolidine
CAS RN
175463-32-8
Appearance
Off-white to white powder
Purity
≥98.0% HPLC
CAS RN
130312-02-6
Appearance
Colorless transparent liquid or white solid
Purity
97% GC
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