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
CAS RN
72648-80-7
Appearance
Light yellow to colorless transparent liquid or light yellow to white solid
Purity
98% GC
Ethyl 6-bromo-4-hydroxy-3-quinolinecarboxylate
CAS RN
79607-23-1
Appearance
Off white to white solid
Purity
98.0% HPLC
(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-(benzyloxy)-4-[2-(cyclopropylmethoxy)ethyl]benzene
CAS RN
63659-15-4
Appearance
Purity
>97% T
CAS RN
36476-84-3
Appearance
White solid
Purity
>98% HPLC
1-methyl-piperidine-2-carboxylicacidmethylester
CAS RN
1690-74-0
Appearance
Light yellow liquid
Purity
98% GC
CAS RN
24807-55-4
Appearance
White to yellowish crystalline powder
Purity
98% HPLC
4-Amidinobenzamide hydrochloride
CAS RN
59855-11-7
Appearance
White solid powder
Purity
98% HPLC
4-Hydroxy Benzeneacetic Acid 2-(DiMethylaMino)-2-oxoethyl...
CAS RN
59721-16-3
Appearance
White solid
Purity
>98%(HPLC, HNMR)
5-(4-Bromophenyl)-6-hydroxypyrimidin-4(1H)-one
CAS RN
706811-25-8
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
106615-61-6
Appearance
Off white to white solid powder
Purity
>98% HPLC
6,7-Bis-(2-methoxyethoxy)-4(3H)-quinazolinone
CAS RN
179688-29-0
Appearance
Off white to white solid powder
Purity
>99% HPLC
BEAZ Bis(2,2,2-trichloroethyl) azodicarboxylate
CAS RN
38857-88-4
Appearance
Yellow crystalline powder
Purity
≥98%HPLC
CAS RN
69261-50-3
Appearance
White solid powder
Purity
>99.0% HPLC
CAS RN
1068-21-9
Appearance
Pale yellow to colorless transparent liquid or solid
Purity
97% GC
DL-methyl-2-amino-2-cyclopropylacetate hydrochloride
CAS RN
535936-86-8
Appearance
White powder
Purity
Ethyl 1,3-dimethylpyrazole-5-carboxylate
CAS RN
5744-40-1
Appearance
Pale yellow transparent liquid
Purity
98%GC
Ethyl 1-Boc-piperidine-2-carboxylate
CAS RN
362703-48-8
Appearance
Light yellow to yellow viscous liquid
Purity
98% GC
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
CAS RN
7597-56-0
Appearance
White solid
Purity
HNMR qualified
CAS RN
328086-60-8
Appearance
Off white to white solid powder
Purity
>98.5% HPLC
Methyl Pentafluorophenyl Carbonate
CAS RN
36919-03-6
Appearance
White crystalline solid or colorless liquid
Purity
98%HPLC
CAS RN
301673-14-3
Appearance
White powder
Purity
Nuclear magnetic resonance qualified
N-Cbz-piperidine-4-carboxylic acid
CAS RN
10314-98-4
Appearance
White or almost white crystalline powder
Purity
98% GC
O-(Tetrahydro-2H-pyran-2-yl)hydroxylamine
CAS RN
6723-30-4
Appearance
White solid or colorless liquid
Purity
98%GC
O-ButylhydroxylaMine Hydrochloride
CAS RN
4490-82-8
Appearance
White crystalline powder
Purity
98 %-103%(AT)
propargyl carbonate N-hydroxysuccinimide ester
CAS RN
484064-96-2
Appearance
Off white to white solid powder
Purity
98% HPLC
Tert-Butyl (2-hydroxyethyl)(methyl)carbamate
CAS RN
57561-39-4
Appearance
colorless liquid
Purity
99% GC
CAS RN
1703794-73-3
Appearance
Off white to white solid powder
Purity
>97% T
CAS RN
775-15-5
Appearance
Pale yellow to colorless transparent liquid
Purity
>98%(GC)
CAS RN
20327-23-5
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0% GC&T
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
87276-51-5
Appearance
Off white to yellowish powder
Purity
>99.0%
ethyl 6-bromo-1,4-dihydro-4-oxoquinoline-3-carboxylate
CAS RN
122794-99-4
Appearance
White to off white solid powder
Purity
>98.0% H-NMR
Ethyl 6-bromo-4-hydroxyquinoline-3-carboxylate
CAS RN
122794-99-4
Appearance
Pale yellow to off white powder
Purity
97% NMR
Ethyl2-chloropyrimidine-5-carboxylate
CAS RN
89793-12-4
Appearance
Off-white to white solid
Purity
>98% HPLC
CAS RN
89-91-8
Appearance
Colorless Transparent Liquid
Purity
98% GC
N-Cbz-PTE Benzyloxycarbonyl-alpha-phosphonoglycine trimethyl...
CAS RN
88568-95-0
Appearance
White to off white solid
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
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
tert-Butyl (2-(benzylamino)ethyl)carbamate
CAS RN
174799-52-1
Appearance
Colorless or light yellow liquid
Purity
>98% HPLC
tert-butyl 4-(4-nitrobenzyl)piperazine-1-carboxylate
CAS RN
130636-61-2
Appearance
Yellow solid
Purity
>99%
CAS RN
41239-10-5
Appearance
Colorless to light yellow liquid
Purity
≥97.0%
1,1,1-Trimethoxy-2-chloroethane
CAS RN
74974-54-2
Appearance
Pale yellow to colorless transparent liquid
Purity
98.8%(GC)
2,4,6-Triphenylpyrylium tetrafluoroborate
CAS RN
448-61-3
Appearance
Yellow powder
Purity
98% HPLC
2-(1,3-Dioxoisoindolin-2-yl)ethanesulfonic acid
CAS RN
4443-24-7
Appearance
White crystalline powder
Purity
>98% HPLC
2-(2-aminoethyl)isoindoline-1,3-dione hydrochloride
CAS RN
30250-67-0
Appearance
White to off white solid
Purity
>99%
2-(carbamoylmethylamino)ethanesulfonic acid
CAS RN
7365-82-4
Appearance
White to off white powder
Purity
>97.0%
CAS RN
2916-68-9
Appearance
Colorless to yellowish liquid
Purity
97% GC
2-Aminothiazole-4-carboxylic Acid Ethyl Ester
CAS RN
5398-36-7
Appearance
Pale yellow to off white 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
2-Methoxyphenylhydrazine hydrochloride
CAS RN
57396-67-5
Appearance
Off white to pink powder
Purity
≥98.0% HPLC
4,6-dichloro-5-nitropyrimidine
CAS RN
4316-93-2
Appearance
Off white to yellowish solid powder
Purity
98% HPLC
4-(Trifluoromethyl)benzimidamidehydrochloride
CAS RN
38980-96-0
Appearance
White solid
Purity
>98%
4-Acetamidobenzenesulfonyl azide
CAS RN
2158-14-7
Appearance
White or off white crystal
Purity
≥98%
4-AMIDINOPYRIDINE HYDROCHLORIDEPYRIDINE-4-CARBOXIMIDAMIDE...
CAS RN
6345-27-3
Appearance
White crystalline powder
Purity
>97% T
4-carbamoylphenylcarbamic acid 2,5-dioxyopyrrolidin-1-yl...
CAS RN
200197-04-2
Appearance
White solid powder
Purity
97% HPLC
5,8,11-Trioxa-2-azatridecanoicacid, 13-amino-,...
CAS RN
101187-40-0
Appearance
Colorless Transparent Liquid
Purity
97% HNMR
CAS RN
60233-66-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
1006-67-3
Appearance
Colorless to yellowish transparent liquid
Purity
GC>99%
CAS RN
31374-18-2
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
75844-40-5
Appearance
Off white to white solid powder
Purity
>98% HPLC
Benzamidine hydrochloride hydrate
CAS RN
206752-36-5
Appearance
White crystalline powder
Purity
98%HPLC
CAS RN
33545-98-1
Appearance
White powder
Purity
97%-102%(AT)
CAS RN
56657-76-2
Appearance
Off white to white solid
Purity
>98%
Cyclopropane-1-carboximidamide hydrochloride
CAS RN
57297-29-7
Appearance
White powder
Purity
97%AT
CAS RN
30364-60-4
Appearance
White solid
Purity
Nuclear magnetic coincidence
Ethyl 1-methyl-3-piperidinecarboxylate
CAS RN
5166-67-6
Appearance
Light yellow liquid
Purity
96% HPLC
Ethyl 3-bromobenzenecarboximidoate hydrochloride
CAS RN
57508-63-1
Appearance
White solid
Purity
CAS RN
10576-12-2
Appearance
White to light green solid or colorless to light green transparent liquid
Purity
97% GC
FMOC-1,4-DIAMINOBUTANE HYDROCHLORIDE
CAS RN
321660-77-9
Appearance
White powder
Purity
>98%
CAS RN
3182-95-4
Appearance
White to bright yellow powder
Purity
99.3% HPLC
Methyl (triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White powder
Purity
99.2% HPLC
Methyl 6-HydroxypyriMidine-4-carboxylate
CAS RN
7399-93-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
24566-79-8
Appearance
White to off white solid
Purity
≥98% GC
N-(Benzyloxycarbonyl)-2-aminoacetonitrile
CAS RN
3589-41-1
Appearance
Pale yellow to white solid powder
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
N-[(Trimethylsilyl)methyl]benzylamine
CAS RN
53215-95-5
Appearance
colorless or light yellow liquid
Purity
≥98.0%
O-(4-Nitrobenzyl)hydroxylamine hydrochloride
CAS RN
2086-26-2
Appearance
Off white to yellowish crystalline powder
Purity
98% HPLC
CAS RN
5329-33-9
Appearance
Off-white to white powder
Purity
≥98.0%
CAS RN
111333-97-2
Appearance
Pale yellow to colorless transparent liquid
Purity
99% GC
CAS RN
24057-28-1
Appearance
White crystal
Purity
98%HPLC
CAS RN
3680-71-5
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
Tert-butyl n,n-bis(2-hydroxyethyl)carbamate
CAS RN
103898-11-9
Appearance
Pale yellow transparent liquid
Purity
97% HNMR
tert-Butyl4-oxo-4,5,6,8-tetrahydropyrido[3,4-d]pyrimidine-7(...
CAS RN
1142188-60-0
Appearance
Off white to white solid powder
Purity
>97% HPLC
TMAD N,N,N',N'-tetramethylazodicarboxamide
CAS RN
10465-78-8
Appearance
Yellow solid
Purity
98%HPLC
(R)-N-Cbz-piperidine-3-carboxylic acid
CAS RN
78190-11-1
Appearance
White to almost white crystalline 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
1,3-Di-Boc-2-(2-hydroxyethyl)guanidine
CAS RN
215050-11-6
Appearance
Off white to yellowish solid powder
Purity
96% HPLC
1-(1-ethoxyethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-...
CAS RN
1029716-44-6
Appearance
White solid
Purity
99.8% HPLC
CAS RN
775-15-5
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(HPLC)
CAS RN
118156-93-7
Appearance
Off white powder
Purity
97% HPLC
1-Boc-piperidine-3-carboxamide
CAS RN
91419-49-7
Appearance
White or light yellow powder
Purity
97% HPLC
1-Boc-piperidine-4-carboxamide
CAS RN
91419-48-6
Appearance
White or light yellow powder
Purity
97% HPLC
2,2-DIFLUORO-N-METHOXY-N-METHYLACETAMIDE
CAS RN
142492-01-1
Appearance
Colorless to light yellow transparent liquid
Purity
≥98% GC
2-Chloropyridine-5-carbaldehyde
CAS RN
23100-12-1
Appearance
Off white to white solid
Purity
98% HPLC
2-Methylpropylhydrazine hydrochloride
CAS RN
237064-47-0
Appearance
White solid
Purity
98%-103% T
3-(tert-Butoxycarbonylamino)propyl bromide
CAS RN
83948-53-2
Appearance
White to off-white powder
Purity
≥98.0% GC
4-Fluorophenylhydrazine hydrochloride
CAS RN
823-85-8
Appearance
White to off white solid
Purity
98%HPLC
4-Nitrobenzamidine, hydrochloride
CAS RN
15723-90-7
Appearance
Pale yellow crystalline powder
Purity
98%HPLC
amino-hydroxyimino-acetic acid ethyl ester
CAS RN
1217428-98-2
Appearance
White solid
Purity
>98%
Cyclohexylmethyl N-tosyloxycarbamate
CAS RN
869111-41-1
Appearance
White to off white solid
Purity
≥ 95%GC
Di-tert-Butyl azodicarboxylate
CAS RN
870-50-8
Appearance
Yellow crystalline powder
Purity
98%GC
DL-2-amino-3-phenylpropan-1-ol
CAS RN
16088-07-6
Appearance
White solid powder
Purity
99.6% HPLC
Ethyl 1-Boc-piperidine-3-carboxylate
CAS RN
130250-54-3
Appearance
Light yellow liquid
Purity
98% GC
N-BENZYL-L-PROLINE ETHYL ESTER
CAS RN
955-40-8
Appearance
Colorless Transparent Liquid
Purity
99.7% GC
N-Boc-N-methoxy-3-aminopropionic acid
CAS RN
172299-81-9
Appearance
Colorless Transparent Liquid
Purity
98% HNMR
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
CAS RN
1013-88-3
Appearance
Colorless to yellowish liquid
Purity
98% GC
1-(9H-FUOREN-9-YL)-3-OXO-2,7,10-TRIOXA-4-AZADODECAN-12-OIC...
CAS RN
166108-71-0
Appearance
Purity
2-Chloro-N-methoxy-N-methylacetamide
CAS RN
67442-07-3
Appearance
White crystal powder to almost white crystal powder
Purity
>98% GC
2-Phthalimidoethane sulfonamide
CAS RN
4443-23-6
Appearance
Off white to white powder
Purity
97% HPLC
2-tert-butyl-1,1,3,3-tetramethyl-guanidine
CAS RN
29166-72-1
Appearance
Pale yellow to colorless transparent liquid
Purity
97%GC
3,5-dimethyl-pyrazole-1-carboxamidinnitrate
CAS RN
38184-47-3
Appearance
White solid powder
Purity
≥98.0%
4 chloro7H pyrrolo 2 3 d pyrimidine
CAS RN
3680-69-1
Appearance
Light brown to brown crystalline powder
Purity
>97% T
4-Aminobenzamidine dihydrochloride
CAS RN
2498-50-2
Appearance
White powder
Purity
98%HPLC
CAS RN
623-04-1
Appearance
Pale yellow to almost white crystalline powder
Purity
98% HPLC
4-Aminopyrazolo[3,4-d]pyrimidine
CAS RN
2380-63-4
Appearance
Light yellow to yellow or light brown powder
Purity
≥98% HPLC
4-Bromophenylhydrazine hydrochloride
CAS RN
622-88-8
Appearance
White to off white solid
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
4-Methoxybenzamidine hydrochloride
CAS RN
51721-68-7
Appearance
White powder
Purity
99%HPLC
CAS RN
73866-23-6
Appearance
Light beige to brown solid
Purity
≥98%
5-methoxy-2,3,3-trimethylindoline
CAS RN
41382-23-4
Appearance
Yellow liquid
Purity
99,00%
6-Bromopyridine-2-carbaldehyde
CAS RN
34160-40-2
Appearance
Pale yellow powder
Purity
98%HPLC
CAS RN
32084-59-6
Appearance
Off white to white solid powder
Purity
>98% HPLC
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
CAS RN
3426-71-9
Appearance
Off white to white powder
Purity
98% HPLC
benzamidine hydrochloride dihydrate
CAS RN
74222-83-6
Appearance
White crystal
Purity
98% HPLC
CAS RN
28170-07-2
Appearance
Colorless to yellowish liquid
Purity
95%GC
CAS RN
1034-39-5
Appearance
Off white crystal or light yellow powder
Purity
97% T
CAS RN
3332-29-4
Appearance
White or yellowish crystals
Purity
98%-103(AT)
Ethyl 1-benzylpiperidine-4-carboxylate
CAS RN
24228-40-8
Appearance
Colorless to light yellow liquid
Purity
98% HPLC
Ethyl 1-Benzylpyrrolidine-3-carboxylate
CAS RN
5747-92-2
Appearance
Pale yellow to colorless transparent liquid
Purity
97% GC
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
Ethyl 4-hydroxypyrimidine-5-carboxylate
CAS RN
4786-52-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
Ethyl acetohydroxamate 50% in THF
CAS RN
10576-12-2
Appearance
Pale yellow to colorless transparent liquid
Purity
49%-51%
Ethyl N-Cbz-4-Oxopyrrolidine-3-carboxylate
CAS RN
51814-19-8
Appearance
Off white to white powder
Purity
98% HPLC
Glycine ethyl ester hydrochloride
CAS RN
623-33-6
Appearance
White crystalline powder
Purity
98% AT
CAS RN
3240-34-4
Appearance
Off white to white powder
Purity
99% HPLC
Methyl 2-(triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White to off white solid
Purity
≥98 %
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