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
165454-06-8
Appearance
Colorless to pale yellow transparent liquid
Purity
≥98.0%
Boc-NH-PEG3;Boc-1-amino-3,6-dioxa-8-octanediamine...
CAS RN
153086-78-3
Appearance
Colorless transparent liquid
Purity
≥98.0%
N-(Diphenylmethylene)-glycine 1-methylethyl ester
CAS RN
119244-11-0
Appearance
White to off-white powder
Purity
≥99.0%
CAS RN
150629-67-7
Appearance
White to off white to pale yellow powder
Purity
≥99.0%
CAS RN
72080-83-2
Appearance
Off-white to white powder
Purity
≥98% HPLC
5-Amino-3-(2-furyl)-1H-1,2,4-triazole
CAS RN
3663-61-4
Appearance
Off-white to white powder
Purity
≥98% HPLC
tert-Butyl (Mesitylsulfonyl) oxycarbaMate
CAS RN
36016-39-4
Appearance
White to off-white powder
Purity
≥98.0%
CAS RN
3378-72-1
Appearance
Colorless to pale yellow or orange transparent liquid
Purity
≥98.0%
Benzyl 1-methylhydrazinecarboxylate
CAS RN
37519-04-3
Appearance
Colorless to pale yellow transparent liquid
Purity
≥97.0%
CAS RN
1037794-22-1
Appearance
Off-white to pale yellow solid
Purity
>99.0%
(2-Chloro-ethyl)-methyl-carbamic acid tert-butyl ester
CAS RN
220074-38-4
Appearance
Colorless to nearly colorless 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
1-Propanaminium-3-[(ethylcarbonimidoyl)amio]-N,N,N-trimethyl...
CAS RN
6179-57-3
Appearance
White to off-white powder
Purity
≥98.0%
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%
(S)-tert-butyl (1-cyano-2-(4-iodophenyl)ethyl)carbamate
CAS RN
1159489-37-8
Appearance
White to pale yellow powder
Purity
≥98.0%
1H-Benzotriazole-5-carboxylic acid
CAS RN
60932-58-3
Appearance
Pale pink to pinkish-red powder
Purity
≥98.0%
(Trimethylsilyl)methanamine hydrochloride
CAS RN
18166-01-3
Appearance
White to off-white crystalline powder
Purity
98.0~102.0% (T)
CAS RN
5637-42-3
Appearance
Quasi white crystal
Purity
98%HPLC
(Trifluoroacetyl)benzotriazole (1H,2H-isomer mixture)
CAS RN
183266-61-7
Appearance
Off white solid
Purity
99,90%
2-Bromo-1,3,5-triisopropylbenzene
CAS RN
21524-34-5
Appearance
Colorless to yellowish liquid
Purity
97% GC
CAS RN
1000806-59-6
Appearance
Colorless to pale yellow viscous liquid
Purity
≥98.0%
4,7-Methano-1H-isoindole-1,3(2H)-dione
CAS RN
245092-43-7
Appearance
White powder
Purity
99.0% HPLC
tert-butyl 4-(4-nitrobenzyl)piperazine-1-carboxylate
CAS RN
130636-61-2
Appearance
Yellow solid
Purity
>99%
1-tert-Butyl-3-ethylcarbodiiMide
CAS RN
1433-27-8
Appearance
Light yellow to colorless transparent liquid
Purity
≥98.0%
2-(2-chloro-5-nitrophenyl)pyridine
CAS RN
879088-40-1
Appearance
Pale yellow to yellow solid
Purity
≥98.0%
Ethyl N-Cbz-4-Oxopyrrolidine-3-carboxylate
CAS RN
51814-19-8
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
7450-69-3
Appearance
Off white to white powder
Purity
≥98.0%
Cyclohexylmethyl N-tosyloxycarbamate
CAS RN
869111-41-1
Appearance
White to off white solid
Purity
≥ 95%GC
Ethyl2-chloropyrimidine-5-carboxylate
CAS RN
89793-12-4
Appearance
Off-white to white solid
Purity
>98% HPLC
CAS RN
69491-64-1
Appearance
White to off-white powder
Purity
≥98.0%
Glycine tert butyl ester hydrochloride
CAS RN
27532-96-3
Appearance
White crystalline powder
Purity
98.0%~102.0% (AgNO₃)
1-(9H-FUOREN-9-YL)-3-OXO-2,7,10-TRIOXA-4-AZADODECAN-12-OIC...
CAS RN
166108-71-0
Appearance
Purity
CAS RN
28170-07-2
Appearance
Colorless to yellowish liquid
Purity
95%GC
CHLOROGLYOXYLIC ACID METHYL ESTER
CAS RN
5781-53-3
Appearance
Pale yellow transparent liquid
Purity
>97% T
tBuO-Ste-Glu(AEEA-AEEA-OH)OtBu
CAS RN
1118767-16-0
Appearance
Pale yellow to colorless viscous oily liquid or solid
Purity
98% HPLC
(S)-(+)-2,2-Dimethyl-1,3-dioxolane-4-methanol
CAS RN
22323-82-6
Appearance
Colorless Transparent Liquid
Purity
98% GC
CAS RN
874-86-2
Appearance
White acicular crystal
Purity
98%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
3589-41-1
Appearance
White to off-white crystalline powder
Purity
≥98.0%
1-(benzyloxy)-4-[2-(cyclopropylmethoxy)ethyl]benzene
CAS RN
63659-15-4
Appearance
Purity
>97% T
2,4,6-Triphenylpyrylium tetrafluoroborate
CAS RN
448-61-3
Appearance
Yellow powder
Purity
98% HPLC
2-(Dimethylamino)ethanol hydrochloride (1:1)
CAS RN
2498-25-1
Appearance
Off white solid particles
Purity
98% T
4-Carbamimidoylbenzoic acid hydrochloride
CAS RN
42823-72-3
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
623-05-2
Appearance
White crystalline powder
Purity
≥99%HPLC
Diphenylmethyleniminoacetonitrile
CAS RN
70591-20-7
Appearance
White to yellow crystalline powder
Purity
98%HPLC
O-ButylhydroxylaMine Hydrochloride
CAS RN
4490-82-8
Appearance
White crystalline powder
Purity
98 %-103%(AT)
1-(ALLYLOXYCARBONYL-OXY)-1 H-BENZOTRIAZOLE
CAS RN
102423-16-5
Appearance
White solid
Purity
98,40%
CAS RN
1594-57-6
Appearance
White crystalline powder
Purity
≥99%HPLC
6-Chloropyrimidine-2,4-diamine
CAS RN
156-83-2
Appearance
Off white solid powder
Purity
98%
CAS RN
871-70-5
Appearance
White to off-white powder
Purity
≥98% HPLC
2-Fluoro-1-methylpyridinium p-toluenesulphonate
CAS RN
58086-67-2
Appearance
White to almost white crystalline powder
Purity
98% HPLC
4-Methoxybenzamidine hydrochloride
CAS RN
51721-68-7
Appearance
White powder
Purity
99%HPLC
5-Bromo-2-(4-boc-piperazin-1-yl)pyrimidine
CAS RN
374930-88-8
Appearance
White powder
Purity
98% HPLC
CAS RN
1866-15-5
Appearance
Off white to white crystalline powder
Purity
98%AT
Chloroformamidine hydrochloride
CAS RN
29671-92-9
Appearance
White crystalline powder
Purity
98%AT
FMOC-1,4-DIAMINOBUTANE HYDROCHLORIDE
CAS RN
321660-77-9
Appearance
White powder
Purity
>98%
N-Benzylhydroxylamine hydrochloride
CAS RN
29601-98-7
Appearance
White crystalline powder
Purity
98%HPLC
2-Chloropyridine-5-carbaldehyde
CAS RN
23100-12-1
Appearance
Off white to white solid
Purity
98% HPLC
D-2-amino-3-(pyridin-3-yl)propanoic acid dihydrochloride
CAS RN
93960-21-5
Appearance
Colorless to yellowish powder
Purity
>99.0% HPLC
N-(Diphenylmethylene)glycerine tert-butyl ester
CAS RN
81477-94-3
Appearance
White to almost white crystalline powder
Purity
98% HPLC
1-(Cyclohexylcarbonyl)piperazine
CAS RN
27561-62-2
Appearance
White powder
Purity
≥97%GC
CAS RN
623-04-1
Appearance
Pale yellow to almost white crystalline powder
Purity
98% HPLC
Ethyl 4-hydroxypyrimidine-5-carboxylate
CAS RN
4786-52-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
170384-29-9
Appearance
Off-white to white crystalline powder
Purity
≥98.0% GC
N-Boc-1h-pyrazole-1-carboxamidine
CAS RN
152120-61-1
Appearance
White crystal
Purity
98% HPLC
CAS RN
71999-74-1
Appearance
Light yellow to colorless transparent liquid or solid
Purity
≥98% GC
(S)-2,3-EPOXY-1-PROPYL TRIPHENYLMETHYL ETHER
CAS RN
129940-50-7
Appearance
Off white to yellowish solid powder
Purity
98% HPLC
1-(6-aminohexyl)-1H-pyrrole-2,5-dione hydrochloride
CAS RN
75238-09-4
Appearance
White solid
Purity
99,30%
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-amino-N-isopropylbenzenesulfonamide
CAS RN
761435-31-8
Appearance
Off white to white solid or liquid
Purity
98% HPLC
Di-tert-Butyl azodicarboxylate
CAS RN
870-50-8
Appearance
Yellow crystalline powder
Purity
98%GC
CAS RN
31037-42-0
Appearance
White to off-white solid
Purity
≥98.0%
1,4-Benzodioxane-2-carboxylic acid
CAS RN
3663-80-7
Appearance
White to off-white powder
Purity
≥98% GC
2-(2-aminoethyl)isoindoline-1,3-dione hydrochloride
CAS RN
30250-67-0
Appearance
White to off white solid
Purity
>99%
2-acetamido-3-(4-bromophenyl)propanoic acid
CAS RN
273730-59-9
Appearance
White solid
Purity
99% HPLC
2-methoxyethyl 4-methylbenzenesulfonate
CAS RN
17178-10-8
Appearance
Colorless to yellowish liquid
Purity
>98%
2-tert-butyl-1,1,3,3-tetramethyl-guanidine
CAS RN
29166-72-1
Appearance
Pale yellow to colorless transparent liquid
Purity
97%GC
4-Aminopyrazolo[3,4-d]pyrimidine
CAS RN
2380-63-4
Appearance
Light yellow to yellow or light brown powder
Purity
≥98% HPLC
CAS RN
54247-27-7
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
CAS RN
2449-05-0
Appearance
Orange crystalline 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
51354-15-5
Appearance
Colorless Transparent Liquid
Purity
>98.0% GC
(R)-4-bebzyloxymethyl-2,2-dimethyl-1,3-dioxolane
CAS RN
14347-83-2
Appearance
Pale yellow to colorless liquid
Purity
98% HPLC
1,3-Di-boc-2-(trifluoromethylsulfonyl)guanidine
CAS RN
207857-15-6
Appearance
White powder
Purity
>95% HPLC
CAS RN
108-75-8
Appearance
Colorless to yellowish transparent liquid
Purity
>98%(GC)
CAS RN
945381-56-6
Appearance
Off white to grey solid
Purity
98.5% HPLC
2-Methylpropylhydrazine hydrochloride
CAS RN
237064-47-0
Appearance
White solid
Purity
98%-103% T
CAS RN
1235983-26-2
Appearance
Pale yellow solid
Purity
Conform to the nuclear magnetic spectrum
Methyl 1-Boc-piperidine-3-carboxylate
CAS RN
148763-41-1
Appearance
Off white to light yellow powder
Purity
98% GC
2-(Trifluoromethyl)phenylhydrazine hydrochloride
CAS RN
3107-34-4
Appearance
Pale yellow powder
Purity
98% HPLC
CAS RN
2916-68-9
Appearance
Colorless to yellowish liquid
Purity
97% GC
2-Phthalimidoethane sulfonamide
CAS RN
4443-23-6
Appearance
Off white to white powder
Purity
97% HPLC
6-Bromopyridine-2-carbaldehyde
CAS RN
34160-40-2
Appearance
Pale yellow powder
Purity
98%HPLC
CAS RN
30364-60-4
Appearance
White solid
Purity
Nuclear magnetic coincidence
DL-methyl-2-amino-2-cyclopropylacetate hydrochloride
CAS RN
535936-86-8
Appearance
White powder
Purity
Ethyl acetohydroxamate 50% in THF
CAS RN
10576-12-2
Appearance
Pale yellow to colorless transparent liquid
Purity
49%-51%
Glycine methyl ester hydrochloride
CAS RN
5680-79-5
Appearance
White crystalline powder
Purity
98% AT
CAS RN
2615-15-8
Appearance
Pale yellow to colorless transparent liquid
Purity
≥99%
N-(3-Aminopropyl)methacrylamide hydrochloride
CAS RN
72607-53-5
Appearance
White powder
Purity
98% HPLC
N-Succinimidyl 6-(3-Maleimidopropionamido) Hexanoate(SMPH...
CAS RN
367927-39-7
Appearance
Off white to white solid
Purity
>97%
N-[(Trimethylsilyl)methyl]benzylamine
CAS RN
53215-95-5
Appearance
colorless or light yellow liquid
Purity
≥98.0%
CAS RN
5329-33-9
Appearance
Off-white to white powder
Purity
≥98.0%
CAS RN
71195-85-2
Appearance
Colorless to yellowish liquid
Purity
98%GC
Tert-Butyl 4-hydroxyphenethylcarbamate
CAS RN
64318-28-1
Appearance
White crystalline powder
Purity
97% GC
1-Boc-4-(2-chloroethyl)piperazine
CAS RN
208167-83-3
Appearance
White crystalline solid
Purity
>98% GC, HNMR
2,2-DIETHOXYETHYLPHOSPHONIC ACID DIETHYL ESTER
CAS RN
7598-61-0
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
2,2-DIFLUORO-N-METHOXY-N-METHYLACETAMIDE
CAS RN
142492-01-1
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
2,4-Dichlorothieno[3,2-d]pyrimidine
CAS RN
16234-14-3
Appearance
Off white to white crystalline powder
Purity
≥98%HPLC
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-(3-CHLOROPROPYL)-2,5,5-TRIMETHYL-[1,3]-DIOXANE
CAS RN
88128-57-8
Appearance
Purity
≥98%
CAS RN
139585-70-9
Appearance
White to off white solid
Purity
97% HPLC
2-Methyl-1-(4-methylphenyl)sulfonylimidazole
CAS RN
86181-71-7
Appearance
White crystalline powder
Purity
98%HPLC
3-(TRIFLUOROMETHYL)PYRAZOLE-4-CARBOXYLIC ACID ETHYL ESTER
CAS RN
155377-19-8
Appearance
Pale yellow to yellow solid
Purity
98.0%(HPLC)
4-(Dimethyl-tert-Butylsilyloxy)butan-1-ol
CAS RN
87184-99-4
Appearance
Colorless to yellowish liquid
Purity
≥98%GC
ACETYLPHOSPHONIC ACID DIETHYL ESTER
CAS RN
919-19-7
Appearance
colorless liquid
Purity
≥97% GC
CLMMB 4-Chloro-n-methoxy-n-methylbenzamide
CAS RN
122334-37-6
Appearance
Colorless Transparent Liquid
Purity
≥98%GC
Methyl 4-aminobutyrate hydrochloride
CAS RN
13031-60-2
Appearance
White solid
Purity
≥98%(AT)
Triphenyl(2-pyridylmethyl)phosphonium chloride hydrochloride
CAS RN
99662-46-1
Appearance
Off-white to white powder
Purity
Titration: 102.3%
N-Benzyl-N-(methoxymethyl)trimethylsilylmethylamine
CAS RN
93102-05-7
Appearance
Colorless to yellow liquid
Purity
≥95.0%
(5-Carboxypentyl)(triphenyl)phosphoniumbromide
CAS RN
50889-29-7
Appearance
White crystalline powder
Purity
>98% HPLC
1-methyl-piperidine-2-carboxylicacidmethylester
CAS RN
1690-74-0
Appearance
Light yellow liquid
Purity
98% GC
2-(1,3-Dioxoisoindolin-2-yl)ethanesulfonic acid
CAS RN
4443-24-7
Appearance
White crystalline powder
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
2-Hydroxypyrimidine hydrochloride
CAS RN
38353-09-2
Appearance
Pale yellow powder
Purity
>98%(HPLC)
3-Methoxybenzamidine hydrochloride
CAS RN
26113-44-0
Appearance
White crystalline powder
Purity
≥98.0 %
CAS RN
5570-77-4
Appearance
Pale yellow liquid
Purity
98% GC
CAS RN
21871-47-6
Appearance
White to off-white powder
Purity
≥98% HPLC
CAS RN
38353-06-9
Appearance
Pale yellow to yellow solid
Purity
98% HPLC
CAS RN
56657-76-2
Appearance
Off white to 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
3240-34-4
Appearance
Off white to white powder
Purity
99% HPLC
N-(Tert-butyl)hydroxylamine hydrochloride
CAS RN
57497-39-9
Appearance
White to almost white crystalline powder
Purity
98%AT
(R)-(-)-2,2-Dimethyl-1,3-dioxolane-4-methanol
CAS RN
14347-78-5
Appearance
Colorless to yellowish transparent liquid
Purity
98% GC
CAS RN
775-16-6
Appearance
Colorless to yellowish transparent liquid
Purity
98%GC
1-Boc-4-[methoxy(methyl)carbamoyl]piperidine
CAS RN
139290-70-3
Appearance
White solid
Purity
98.7% HPLC
1-Chloroethyl (4-nitrophenyl) carbonate
CAS RN
101623-69-2
Appearance
Off white powder
Purity
99% HPLC
2-Amidinopyrimidine hydrochloride
CAS RN
138588-40-6
Appearance
Yellow green solid
Purity
98%HPLC
CAS RN
87276-51-5
Appearance
Off white to yellowish powder
Purity
>99.0%
CAS RN
144564-95-4
Appearance
White to off white powder
Purity
98% HPLC
Pyridine-2,6-dicarboximidamide Dihydrochloride
CAS RN
1394382-56-9
Appearance
White to off-white powder
Purity
98~102% T
4-Acetamidobenzenesulfonyl azide
CAS RN
2158-14-7
Appearance
White or off white crystal
Purity
≥98%
5,8,11-Trioxa-2-azatridecanoicacid, 13-amino-,...
CAS RN
101187-40-0
Appearance
Colorless Transparent Liquid
Purity
97% HNMR
7-Bromo-3,4-dihydroquinazolin-4-one
CAS RN
194851-16-6
Appearance
Off white to white solid powder
Purity
>98% HPLC
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