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
CAS RN
7450-69-3
Appearance
Off white to white powder
Purity
≥98.0%
Ethyl iminobenzoate hydrochloride
CAS RN
5333-86-8
Appearance
White crystalline powder
Purity
98%HPLC
CAS RN
50595-15-8
Appearance
Colorless Transparent Liquid
Purity
97%GC
CAS RN
945381-56-6
Appearance
Off white to grey solid
Purity
98.5% HPLC
tert-butyl 4-(4-nitrobenzyl)piperazine-1-carboxylate
CAS RN
130636-61-2
Appearance
Yellow solid
Purity
>99%
Tert-Butyl N-(tert-butoxycarbonyloxy)carbamate
CAS RN
85006-25-3
Appearance
White powder
Purity
98%GC
CAS RN
38353-06-9
Appearance
Pale yellow to yellow solid
Purity
98% HPLC
N-tert-butoxycarbonyl-2-amino-2-methyl-1-propanol
CAS RN
102520-97-8
Appearance
crystal
Purity
98% GC
CAS RN
69491-64-1
Appearance
White to off-white powder
Purity
≥98.0%
4,7-Methano-1H-isoindole-1,3(2H)-dione
CAS RN
245092-43-7
Appearance
White powder
Purity
99.0% HPLC
CAS RN
172089-14-4
Appearance
Colorless to light yellow or orange oily substance
Purity
≥98% HPLC
CAS RN
1452-77-3
Appearance
White crystalline powder
Purity
>98% HPLC
2-(1,3-Dioxoisoindolin-2-yl)ethanesulfonic acid
CAS RN
4443-24-7
Appearance
White crystalline powder
Purity
>98% HPLC
FCPCL 1-(2-Furanylcarbonyl)piperazine hydrochloride
CAS RN
60548-09-6
Appearance
White to off white solid
Purity
98%HPLC
CAS RN
3182-95-4
Appearance
White to bright yellow powder
Purity
99.3% HPLC
4-carbamoylphenylcarbamic acid 2,5-dioxyopyrrolidin-1-yl...
CAS RN
200197-04-2
Appearance
White solid powder
Purity
97% HPLC
1-(9H-FUOREN-9-YL)-3-OXO-2,7,10-TRIOXA-4-AZADODECAN-12-OIC...
CAS RN
166108-71-0
Appearance
Purity
Methyl 1-Boc-piperidine-2-carboxylate
CAS RN
167423-93-0
Appearance
Light yellow liquid
Purity
98% GC
N-(Benzyloxycarbonyl)-2-aminoacetonitrile
CAS RN
3589-41-1
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
CAS RN
68076-36-8
Appearance
Colorless to yellowish liquid
Purity
97% GC
CAS RN
71999-74-1
Appearance
Light yellow to colorless transparent liquid or solid
Purity
≥98% GC
1-Boc-4-(2-chloroethyl)piperazine
CAS RN
208167-83-3
Appearance
White crystalline solid
Purity
>98% GC, HNMR
TERT-BUTYL 2,4-DIOXOPIPERIDINE-1-CARBOXYLATE
CAS RN
845267-78-9
Appearance
White to light yellow crystalline powder
Purity
≥98%
Tetraisopropylazodicarboxamide
CAS RN
155877-06-8
Appearance
Yellow solid
Purity
99%HPLC
3,5-dimethyl-pyrazole-1-carboxamidinnitrate
CAS RN
38184-47-3
Appearance
White solid powder
Purity
≥98.0%
4-(1-Acetylpiperazin-4-yl)phenol
CAS RN
67914-60-7
Appearance
Off white solid
Purity
>97% T
CAS RN
75844-40-5
Appearance
Off white to white solid powder
Purity
>98% HPLC
N-(2-Aminoethyl)methacrylamide Hydrochloride
CAS RN
76259-32-0
Appearance
White to off-white powder
Purity
98-102%(T)
N-(tert-butoxycarbonylamino)phthalimide
CAS RN
34387-89-8
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
TMAD N,N,N',N'-tetramethylazodicarboxamide
CAS RN
10465-78-8
Appearance
Yellow solid
Purity
98%HPLC
4-hydroxymethyl-3-methoxyphenylacetic acid
CAS RN
83590-77-6
Appearance
Off white to white powder
Purity
98% HPLC
N-[Tris(hydroxymethyl)methyl]acrylamide
CAS RN
13880-05-2
Appearance
White crystal
Purity
>98% HPLC
CAS RN
2398-81-4
Appearance
White to almost white or light yellow powder
Purity
≥98% HPLC
tert-Butyl (Mesitylsulfonyl) oxycarbaMate
CAS RN
36016-39-4
Appearance
White to off-white powder
Purity
≥98.0%
[2-(4-maleimidophenyl)]acetic acid
CAS RN
91574-45-7
Appearance
Yellow solid
Purity
98% HPLC
1-Ethyl-1-methylpyrrolidinium bromide
CAS RN
69227-51-6
Appearance
Pale yellow solid powder
Purity
>97.0%(T)
4,6-dichloro-5-nitropyrimidine
CAS RN
4316-93-2
Appearance
Off white to yellowish solid powder
Purity
98% HPLC
CAS RN
32779-36-5
Appearance
White crystalline powder
Purity
98%HPLC
Ethyl acetohydroxamate 50% in THF
CAS RN
10576-12-2
Appearance
Pale yellow to colorless transparent liquid
Purity
49%-51%
CAS RN
5006-62-2
Appearance
Colorless to yellowish liquid
Purity
98% GC
N-(Diphenylmethylene)glycine ethyl ester
CAS RN
69555-14-2
Appearance
Off white to white powder
Purity
98% HPLC
(S)-2,3-EPOXY-1-PROPYL TRIPHENYLMETHYL ETHER
CAS RN
129940-50-7
Appearance
Off white to yellowish solid powder
Purity
98% HPLC
1-Boc-3-hydroxymethylpyrrolidine
CAS RN
114214-69-6
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
2-Bromo-1,3,5-triisopropylbenzene
CAS RN
21524-34-5
Appearance
Colorless to yellowish liquid
Purity
97% GC
3,5-dimethylpyrazole-1-carboxamidine
CAS RN
22906-75-8
Appearance
Light pink to almost white powder
Purity
≥98% HPLC
CAS RN
89102-73-8
Appearance
Pale yellow to colorless transparent liquid
Purity
97% HPLC
6-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)hexanehydrazide...
CAS RN
175290-73-0
Appearance
White powder
Purity
98% HPLC
CAS RN
24057-28-1
Appearance
White crystal
Purity
98%HPLC
Diphenylmethyleniminoacetonitrile
CAS RN
70591-20-7
Appearance
White to yellow crystalline powder
Purity
98%HPLC
N-(Tert-butyl)hydroxylamine hydrochloride
CAS RN
57497-39-9
Appearance
White to almost white crystalline powder
Purity
98%AT
1,1,1,3,3,3-Hexafluoro-2-propanol
CAS RN
920-66-1
Appearance
Colorless Transparent Liquid
Purity
98% GC
CAS RN
1546-79-8
Appearance
Pale yellow to colorless liquid
Purity
≥98% GC
1-sec-butylhydrazine dihydrochloride
CAS RN
1177361-36-2
Appearance
White solid
Purity
滴定含量97%-103%
2-Bromo-5-fluoropyridine 1-oxide
CAS RN
935534-39-7
Appearance
Light yellow to almost white solid
Purity
≥98.0%
CAS RN
14997-58-1
Appearance
White powder
Purity
98.5% HPLC; 98.5% T
Diisopropyl 3,3-dimethoxycyclobutane-1,1-dicarboxylate
CAS RN
115118-68-8
Appearance
Purity
≥98%
METHYLBENZIMIDATE HYDROCHLORIDE
CAS RN
5873-90-5
Appearance
White solid
Purity
Titration content 101.5%
N-(tert-butoxycarbonyl)-2-methyl-1,3-diaminopropane
CAS RN
480452-05-9
Appearance
Colorless or light yellow liquid
Purity
98% GC
N-ALPHA-CARBOBENZOXY-L-HISTIDINE HYDRAZIDE
CAS RN
49706-31-2
Appearance
White powder
Purity
≥98.0%
CAS RN
101930-07-8
Appearance
Transparent to yellowish liquid
Purity
97% HPLC
CAS RN
773-64-8
Appearance
White crystalline powder
Purity
98% HPLC
3-Methoxybenzamidine hydrochloride
CAS RN
26113-44-0
Appearance
White crystalline powder
Purity
≥98.0 %
CAS RN
874-90-8
Appearance
White crystalline powder
Purity
98%HPLC
CAS RN
813-77-4
Appearance
Colorless Transparent Liquid
Purity
95% GC
N-(Diphenylmethylene)glycine Methyl Ester
CAS RN
81167-39-7
Appearance
Off white to white powder
Purity
98% HPLC
N-Boc-PTE Methyl n-boc-2-(dimethylphosphono)glycinate
CAS RN
89524-98-1
Appearance
White powder
Purity
97% HPLC
2-Bromobenzamidine hydrochloride
CAS RN
57075-82-8
Appearance
White 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-methoxyethyl 4-methylbenzenesulfonate
CAS RN
17178-10-8
Appearance
Colorless to yellowish liquid
Purity
>98%
CAS RN
1193-21-1
Appearance
Off white to white solid powder
Purity
>99% HPLC
6,7-Bis-(2-methoxyethoxy)-4(3H)-quinazolinone
CAS RN
179688-29-0
Appearance
Off white to white solid powder
Purity
>99% HPLC
Diethyl (Phthalimidomethyl)phosphonate
CAS RN
33512-26-4
Appearance
White to off white solid
Purity
≥98% GC
CAS RN
10576-12-2
Appearance
White to light green solid or colorless to light green transparent liquid
Purity
97% GC
Myristic acid N-hydroxysuccinimide ester
CAS RN
69888-86-4
Appearance
Off white to white crystals
Purity
99% HPLC
N-[(Trimethylsilyl)methyl]benzylamine
CAS RN
53215-95-5
Appearance
colorless or light yellow liquid
Purity
≥98.0%
CAS RN
500-73-2
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
(3aR,4S,7R,7aS) 4,7-Methano-1H-isoindole-1,3(2H)-dione
CAS RN
14805-29-9
Appearance
Purity
≥98%
CAS RN
929-59-9
Appearance
Pale yellow clear liquid
Purity
>97% T
CAS RN
108-75-8
Appearance
Colorless to yellowish transparent liquid
Purity
>98%(GC)
2-tert-butyl-1,1,3,3-tetramethyl-guanidine
CAS RN
29166-72-1
Appearance
Pale yellow to colorless transparent liquid
Purity
97%GC
4,6-Diisopropylpyrimidin-5-amine
CAS RN
2168417-89-6
Appearance
Off white to yellowish solid powder
Purity
98% HPLC
6,7-Dimethoxy-3,4-dihydroquinazoline-4-one
CAS RN
13794-72-4
Appearance
Off white to white solid 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
CAS RN
584-13-4
Appearance
White crystalline powder
Purity
98%HPLC
6-maleimidohexanoic acid pentafluorophenyl ester
CAS RN
692739-25-6
Appearance
White solid
Purity
99,60%
Benzyl 3-pyrroline-1-carboxylate
CAS RN
31970-04-4
Appearance
Yellow liquid or yellow to almost white solid
Purity
98% GC
Ethyl 1-Boc-piperidine-2-carboxylate
CAS RN
362703-48-8
Appearance
Light yellow to yellow viscous liquid
Purity
98% GC
N-(4-Cyanophenyl)guanidine hydrochloride
CAS RN
373690-68-7
Appearance
White crystal
Purity
98%HPLC
1-Benzylpyrrolidin-3-one,hydrochloride
CAS RN
1012-01-7
Appearance
Off white to off white powder
Purity
>98%(HPLC)
CAS RN
1445-73-4
Appearance
Transparent yellow to orange liquid
Purity
>98% GC
Chloroformamidine hydrochloride
CAS RN
29671-92-9
Appearance
White crystalline powder
Purity
98%AT
DCAD Bis(4-chlorobenzyl) azodicarboxylate
CAS RN
916320-82-6
Appearance
Orange solid
Purity
≥98.0%HPLC
methyl 2-((tert-butoxycarbonyl)oxy)acetate
CAS RN
878395-91-6
Appearance
colorless liquid
Purity
99% GC
Triphenyl(2-pyridylmethyl)phosphonium chloride hydrochloride
CAS RN
99662-46-1
Appearance
Off-white to white powder
Purity
Titration: 102.3%
1,1,1-Trimethoxy-2-chloroethane
CAS RN
74974-54-2
Appearance
Pale yellow to colorless transparent liquid
Purity
98.8%(GC)
1-methyl-piperidine-2-carboxylicacidmethylester
CAS RN
1690-74-0
Appearance
Light yellow liquid
Purity
98% GC
4,5,6,7-tetrahydro-1H-benzoimidazole
CAS RN
3752-24-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
4-Fluorobenzamidine hydrochloride
CAS RN
456-14-4
Appearance
White to almost white crystalline powder
Purity
98%HPLC
CAS RN
32084-59-6
Appearance
Off white to white solid powder
Purity
>98% HPLC
CHLOROGLYOXYLIC ACID METHYL ESTER
CAS RN
5781-53-3
Appearance
Pale yellow transparent liquid
Purity
>97% T
Cyclopropane-1-carboximidamide hydrochloride
CAS RN
57297-29-7
Appearance
White powder
Purity
97%AT
CAS RN
7597-56-0
Appearance
White solid
Purity
HNMR qualified
CAS RN
57260-73-8
Appearance
Colorless Transparent Liquid
Purity
98%GC
(9H-Fluoren-9-yl)methyl (2-(azidosulfonyl)ethyl)carbamate...
CAS RN
849949-18-4
Appearance
White to off-white 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
4-Methoxyphenylhydrazine hydrochloride
CAS RN
19501-58-7
Appearance
Off 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
HTIB [Hydroxy(tosyloxy)iodo]benzene
CAS RN
27126-76-7
Appearance
Off white to yellowish crystalline powder
Purity
99%HPLC
CAS RN
22509-74-6
Appearance
Off white to white crystalline powder
Purity
97% HPLC
Tert-butyl N-(2-acetamidoethyl)carbamate
CAS RN
207129-09-7
Appearance
Off white to white solid
Purity
99% GC
CAS RN
106615-61-6
Appearance
Off white to white solid powder
Purity
>98% HPLC
Methyl triethyl ammonium tetrafluoroborate
CAS RN
69444-47-9
Appearance
White blocky solid
Purity
97% HNMR
1,3-Di-Boc-2-(2-hydroxyethyl)guanidine
CAS RN
215050-11-6
Appearance
Off white to yellowish solid powder
Purity
96% HPLC
1-(Cyclohexylcarbonyl)piperazine
CAS RN
27561-62-2
Appearance
White powder
Purity
≥97%GC
1-Boc-2-piperidinecarbaldehyde
CAS RN
157634-02-1
Appearance
Light yellow viscous liquid or solid
Purity
95% HPLC
CAS RN
2916-68-9
Appearance
Colorless to yellowish liquid
Purity
97% GC
4-Acetamidobenzenesulfonyl azide
CAS RN
2158-14-7
Appearance
White or off white crystal
Purity
≥98%
N-(tert-Butoxycarbonyl)-1,2-phenylenediamine
CAS RN
146651-75-4
Appearance
Orange solid
Purity
98% HPLC
CAS RN
98968-72-0
Appearance
White to yellowish powder
Purity
98% GC
CAS RN
72080-83-2
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
27687-14-5
Appearance
White or light yellow crystalline powder
Purity
98% GC
1,13-DIAMINO-4,7,10-TRIOXATRIDECANE
CAS RN
4246-51-9
Appearance
Pale yellow to colorless transparent liquid
Purity
97% GC
1-Ethyl-3-methylimidazolium ethylsulfate
CAS RN
342573-75-5
Appearance
White to off white solid
Purity
98% HPLC
6-Hydroxy-2,3-dihydrobenzo[b]furan-3-one
CAS RN
6272-26-0
Appearance
Grey powder
Purity
98%HPLC
Ethyl-2-(bis(2-oxooxazolidin-3-yl)phosphoryloxyimino)-2-cyan...
CAS RN
117683-30-4
Appearance
White solid
Purity
Conform to the nuclear magnetic spectrum
Glycine methyl ester hydrochloride
CAS RN
5680-79-5
Appearance
White crystalline powder
Purity
98% AT
CAS RN
5637-42-3
Appearance
Quasi 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
CAS RN
1000806-59-6
Appearance
Colorless to pale yellow viscous liquid
Purity
≥98.0%
(R)-1-carboxybut-3-en-1-aminium chloride
CAS RN
108412-04-0
Appearance
White crystalline powder
Purity
CAS RN
2213-63-0
Appearance
Off white to light brown
Purity
98% NMR
CAS RN
2353-44-8
Appearance
Blue solid
Purity
HNMR qualified
CAS RN
87-42-3
Appearance
Off white to white solid powder
Purity
>98% HPLC
1-(2,3-Dihydro-1,4-benzodioxin-2-ylcarbonyl)piperazine...
CAS RN
70918-74-0
Appearance
White to almost white solid
Purity
≥97.0%
2,4,6-triisopropylbenzenesulfonyl hydrazide
CAS RN
39085-59-1
Appearance
White crystal
Purity
97%HPLC
2,4-Dimethoxy-4-hydroxyacetophenone
CAS RN
41351-30-8
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
CAS RN
111333-97-2
Appearance
Pale yellow to colorless transparent liquid
Purity
99% GC
CAS RN
20327-23-5
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0% GC&T
1-N-ethoxycarbonyl-3-pyrrolidone
CAS RN
14891-10-2
Appearance
Pale yellow to colorless transparent liquid
Purity
≥98%
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