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
4-Fluorophenylhydrazine hydrochloride
CAS RN
823-85-8
Appearance
White to off white solid
Purity
98%HPLC
CAS RN
75178-96-0
Appearance
White solid or colorless liquid
Purity
97% GC
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
2353-44-8
Appearance
Blue solid
Purity
HNMR qualified
Ethyl 1-Boc-piperidine-3-carboxylate
CAS RN
130250-54-3
Appearance
Light yellow liquid
Purity
98% GC
N,O-Dimethylhydroxylamine hydrochloride
CAS RN
6638-79-5
Appearance
White to yellowish crystalline powder
Purity
98%-103%(T)
CAS RN
1703794-73-3
Appearance
Off white to white solid powder
Purity
>97% T
(R)-1-carboxybut-3-en-1-aminium chloride
CAS RN
108412-04-0
Appearance
White crystalline powder
Purity
CAS RN
2127-03-9
Appearance
Off white to white crystalline powder
Purity
99%HPLC
CAS RN
133975-85-6
Appearance
Colorless viscous liquid
Purity
>98%
ACETYLPHOSPHONIC ACID DIETHYL ESTER
CAS RN
919-19-7
Appearance
colorless liquid
Purity
≥97% GC
Ethyl2-chloropyrimidine-5-carboxylate
CAS RN
89793-12-4
Appearance
Off-white to white solid
Purity
>98% HPLC
Octadecanedioic acid mono-tert-butyl ester
CAS RN
843666-40-0
Appearance
Off white to white solid powder
Purity
99% T
4-Hydroxybenzamidine hydrochloride
CAS RN
38148-63-9
Appearance
White to off white powder
Purity
99%HPLC
6-maleimidohexanoic acid pentafluorophenyl ester
CAS RN
692739-25-6
Appearance
White solid
Purity
99,60%
CAS RN
7597-56-0
Appearance
White solid
Purity
HNMR qualified
N-(tert-butoxycarbonyl)-2-methyl-1,3-diaminopropane
CAS RN
480452-05-9
Appearance
Colorless or light yellow liquid
Purity
98% GC
CAS RN
111333-97-2
Appearance
Pale yellow to colorless transparent liquid
Purity
99% GC
Tert-butyl amidinomethylcarbamate hydrochloride
CAS RN
691898-38-1
Appearance
White powder
Purity
≥98% HPLC
CAS RN
118156-93-7
Appearance
Off white powder
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-(Trifluoromethyl)phenylhydrazine hydrochloride
CAS RN
3107-34-4
Appearance
Pale yellow powder
Purity
98% HPLC
CAS RN
13020-57-0
Appearance
Pale yellow to white solid powder
Purity
98% HPLC
CAS RN
124072-61-3
Appearance
Off white to white solid powder
Purity
98.0%(T)
Methyl 2-(triphenylphosphoranylidene)acetate
CAS RN
2605-67-6
Appearance
White to off white solid
Purity
≥98 %
N-Boc-N-methoxy-3-aminopropionic acid
CAS RN
172299-81-9
Appearance
Colorless Transparent Liquid
Purity
98% HNMR
CAS RN
930-88-1
Appearance
Off white to white powder
Purity
98% HPLC
O-(4-Nitrobenzyl)hydroxylamine hydrochloride
CAS RN
2086-26-2
Appearance
Off white to yellowish crystalline powder
Purity
98% HPLC
tert-butyl 4-(4-nitrobenzyl)piperazine-1-carboxylate
CAS RN
130636-61-2
Appearance
Yellow solid
Purity
>99%
CAS RN
3182-95-4
Appearance
White to bright yellow powder
Purity
99.3% HPLC
Methyl triethyl ammonium tetrafluoroborate
CAS RN
69444-47-9
Appearance
White blocky solid
Purity
97% HNMR
1,3-Di-boc-2-(trifluoromethylsulfonyl)guanidine
CAS RN
207857-15-6
Appearance
White powder
Purity
>95% HPLC
1-(4-(methylamino)phenyl)ethanone
CAS RN
17687-47-7
Appearance
Pale yellow powder
Purity
97% HPLC
1-Boc-3-hydroxymethylpyrrolidine
CAS RN
114214-69-6
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
4-carbamoylphenylcarbamic acid 2,5-dioxyopyrrolidin-1-yl...
CAS RN
200197-04-2
Appearance
White solid powder
Purity
97% HPLC
DCAD Bis(4-chlorobenzyl) azodicarboxylate
CAS RN
916320-82-6
Appearance
Orange solid
Purity
≥98.0%HPLC
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
N-(Diphenylmethylene)glycine Methyl Ester
CAS RN
81167-39-7
Appearance
Off white to white powder
Purity
98% HPLC
Succinimidyl-[4-(N-maleimidomethyl)]-cyclohexane-1-carboxy-(...
CAS RN
125559-00-4
Appearance
White solid
Purity
>95%
TPTZ 2,4,6-Tri(2-pyridyl)-1,3,5-triazine
CAS RN
3682-35-7
Appearance
Pale yellow powder
Purity
99% HPLC
CAS RN
617-37-8
Appearance
colorless liquid
Purity
>95.0% H-NMR
2-Bromo-1H-isoindole-1,3(2H)-dione
CAS RN
5332-26-3
Appearance
Off white to white solid
Purity
98% HPLC
2-Propenoic acid, 3-bromo-2-methyl-, ethyl ester, (2E)-
CAS RN
38104-06-2
Appearance
Colorless to yellowish liquid
Purity
>98% HPLC
3,5-dimethyl-pyrazole-1-carboxamidinnitrate
CAS RN
38184-47-3
Appearance
White solid powder
Purity
≥98.0%
CAS RN
623-05-2
Appearance
White crystalline powder
Purity
≥99%HPLC
CAS RN
73866-23-6
Appearance
Light beige to brown solid
Purity
≥98%
CAS RN
3426-71-9
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
69261-50-3
Appearance
White solid powder
Purity
>99.0% HPLC
CAS RN
10576-12-2
Appearance
White to light green solid or colorless to light green transparent liquid
Purity
97% GC
Ethyl N-Cbz-4-Oxopyrrolidine-3-carboxylate
CAS RN
51814-19-8
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
5617-32-3
Appearance
Colorless to light yellow liquid
Purity
≥98.0%
CAS RN
112257-19-9
Appearance
Pale yellow to colorless liquid
Purity
>98% GC, HNMR
O-diphenylphosphinylhydroxylamine
CAS RN
72804-96-7
Appearance
White powder
Purity
90% HPLC
TETRAETHYLENE GLYCOL DI-P-TOSYLATE
CAS RN
37860-51-8
Appearance
Off white to white solid
Purity
97% HPLC
11-Maleimidoundecanoic Acid Sulfo-N-Succinimidyl Ester
CAS RN
211236-68-9
Appearance
White to off white solid
Purity
>95% H-NMR
CAS RN
2213-63-0
Appearance
Off white to light brown
Purity
98% NMR
2,5-dioxopyrrolidin-1-yl octanoate
CAS RN
14464-30-3
Appearance
White solid
Purity
>98%
2-Phenylacetimidamidehydrochloride
CAS RN
2498-46-6
Appearance
White solid
Purity
>97%
CAS RN
89102-73-8
Appearance
Pale yellow to colorless transparent liquid
Purity
97% HPLC
3-METHYL-5-(PHENYLMETHOXY)-2-[4-(PHENYLMETHOXY)PHENYL]-1H-IN...
CAS RN
198479-63-9
Appearance
Purity
≥98%
CAS RN
874-86-2
Appearance
White acicular crystal
Purity
98%HPLC
4-Methoxyphenylhydrazine hydrochloride
CAS RN
19501-58-7
Appearance
Off white powder
Purity
97%HPLC
6-Bromonicotinic acid ethyl ester
CAS RN
132334-98-6
Appearance
Pale yellow transparent liquid or solid
Purity
98%GC
Boc-1,3-diaminopropane hydrochloride
CAS RN
127346-48-9
Appearance
White crystalline powder
Purity
98 %-103%(AT)
Dabcyl-Osu 4-[4-(Dimethylamino)phenylazo]benzoic acid...
CAS RN
146998-31-4
Appearance
Red powder
Purity
97%HPLC
CAS RN
1235983-26-2
Appearance
Pale yellow solid
Purity
Conform to the nuclear magnetic spectrum
Ethyl 6-bromo-4-hydroxyquinoline-3-carboxylate
CAS RN
122794-99-4
Appearance
Pale yellow to off white powder
Purity
97% NMR
Methyl 4-aminobutyrate hydrochloride
CAS RN
13031-60-2
Appearance
White solid
Purity
≥98%(AT)
CAS RN
301673-14-3
Appearance
White powder
Purity
Nuclear magnetic resonance qualified
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
Pyrazine-2-carboximidamidehydrochloride
CAS RN
138588-41-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
Terephthalimidamidedihydrochloride
CAS RN
14401-56-0
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
26351-19-9
Appearance
Off white to white powder
Purity
≥98%HPLC
1-(4-methoxybenzyl)hydrazine dihydrochloride
CAS RN
412327-07-2
Appearance
Off white to yellowish solid powder
Purity
97% HPLC
CAS RN
3321-64-0
Appearance
Light yellow to white flaky solid
Purity
>98.0% qNMR
4,5,6,7-tetrahydro-1H-benzoimidazole
CAS RN
3752-24-7
Appearance
Off white to white solid powder
Purity
>98% HPLC
4-(Trifluoromethyl)benzimidamidehydrochloride
CAS RN
38980-96-0
Appearance
White solid
Purity
>98%
4-Carbamimidoylbenzoic acid hydrochloride
CAS RN
42823-72-3
Appearance
Off white to white powder
Purity
98% HPLC
CAS RN
1670-14-0
Appearance
White crystalline powder
Purity
≥98.0% HPLC
Ethyl 2-[(diphenylmethylene)amino]-2-ethylbutanoate
CAS RN
189631-94-5
Appearance
Purity
Ethyl 4-hydroxypyrimidine-5-carboxylate
CAS RN
4786-52-1
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-Butoxycarbonyloxy)phthalimide
CAS RN
15263-20-4
Appearance
White to off white solid
Purity
≥95% HPLC
O-(Tetrahydro-2H-pyran-2-yl)hydroxylamine
CAS RN
6723-30-4
Appearance
White solid or colorless liquid
Purity
98%GC
O-Benzoyl-N-tert-butylhydroxylamine hydrochloride
CAS RN
66809-86-7
Appearance
Purity
98% HPLC
propargyl carbonate N-hydroxysuccinimide ester
CAS RN
484064-96-2
Appearance
Off white to white solid powder
Purity
98% HPLC
Pyridine-2-carboximidamide hydrochloride
CAS RN
51285-26-8
Appearance
Off white to white 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%
1-N-ethoxycarbonyl-3-pyrrolidone
CAS RN
14891-10-2
Appearance
Pale yellow to colorless transparent liquid
Purity
≥98%
1-{[(p-nitrobenzyl)oxy]carbonyl}-1H-benzotriazole
CAS RN
86832-06-6
Appearance
Off white to white powder
Purity
98% HPLC
2,4,6-trimethylbenzenesulfonyl hydrazide
CAS RN
16182-15-3
Appearance
White off white crystalline powder
Purity
97%AT
2-Chloropyridine-5-carbaldehyde
CAS RN
23100-12-1
Appearance
Off white to white solid
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)
CAS RN
874-90-8
Appearance
White crystalline powder
Purity
98%HPLC
Methyl 1-Boc-piperidine-3-carboxylate
CAS RN
148763-41-1
Appearance
Off white to light yellow powder
Purity
98% GC
Methyl 4-(diethylcarbamoyl)benzoate
CAS RN
122357-96-4
Appearance
Pale yellow transparent liquid
Purity
98% HPLC
N-(TERT-BUTYL)-2-CHLOROACETAMIDE
CAS RN
15678-99-6
Appearance
White to almost white crystalline powder
Purity
≥98% HPLC
N-Benzylhydroxylamine hydrochloride
CAS RN
29601-98-7
Appearance
White crystalline powder
Purity
98%HPLC
CAS RN
72080-83-2
Appearance
Off-white to white powder
Purity
≥98% HPLC
N-Cbz-PTE Benzyloxycarbonyl-alpha-phosphonoglycine trimethyl...
CAS RN
88568-95-0
Appearance
White to off white solid
Purity
98% HPLC
Tert-Butyl N-(tert-butoxycarbonyloxy)carbamate
CAS RN
85006-25-3
Appearance
White powder
Purity
98%GC
[2-(4-maleimidophenyl)]acetic acid
CAS RN
91574-45-7
Appearance
Yellow solid
Purity
98% HPLC
1-Boc-piperidine-2-carboxamide
CAS RN
388077-74-5
Appearance
White or almost white crystalline powder
Purity
97% GC
CAS RN
693-05-0
Appearance
Light yellow solid
Purity
98% GC
4-Phenylbenzamidine hydrochloride
CAS RN
111082-23-6
Appearance
Off white to white powder
Purity
98%HPLC
5-methoxy-2,3,3-trimethylindoline
CAS RN
41382-23-4
Appearance
Yellow liquid
Purity
99,00%
Benzyl 3-pyrroline-1-carboxylate
CAS RN
31970-04-4
Appearance
Yellow liquid or yellow to almost white solid
Purity
98% GC
CAS RN
33545-98-1
Appearance
White powder
Purity
97%-102%(AT)
FMOC-1,4-DIAMINOBUTANE HYDROCHLORIDE
CAS RN
321660-77-9
Appearance
White powder
Purity
>98%
N-tert-butoxycarbonyl-2-amino-2-methyl-1-propanol
CAS RN
102520-97-8
Appearance
crystal
Purity
98% GC
CAS RN
4144-22-3
Appearance
Pale yellow to colorless transparent liquid
Purity
98.0%(GC)
CAS RN
76-83-5
Appearance
Off white to yellowish crystalline 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-(Diphenylmethyl)-3-hydroxyazetidine
CAS RN
18621-17-5
Appearance
White solid
Purity
>98% HPLC
1-Boc-4-piperidyl Methacrylate
CAS RN
1229727-38-1
Appearance
White to light yellow solid or colorless to light yellow liquid
Purity
≥98% GC
CAS RN
1445-73-4
Appearance
Transparent yellow to orange liquid
Purity
>98% GC
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)
CAS RN
108-75-8
Appearance
Colorless to yellowish 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
2,5-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
CAS RN
87276-51-5
Appearance
Off white to yellowish powder
Purity
>99.0%
4-cyclohexyl-piperazine-1-carboxylic acid tert-butyl ester
CAS RN
1224935-95-8
Appearance
White powder
Purity
97% HPLC
CAS RN
17696-11-6
Appearance
Pale yellow to off white solid or transparent liquid
Purity
>97.0%(GC)
9-Fluorenylmethyl N-hydroxycarbamate
CAS RN
190656-01-0
Appearance
White to off white solid
Purity
98% HPLC
CAS RN
2404-75-3
Appearance
colorless liquid
Purity
>99% GC
N-(tert-Butoxycarbonyl)-1,2-phenylenediamine
CAS RN
146651-75-4
Appearance
Orange solid
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
1,1,1-Trimethoxy-2-chloroethane
CAS RN
74974-54-2
Appearance
Pale yellow to colorless transparent liquid
Purity
98.8%(GC)
1-(9H-FUOREN-9-YL)-3-OXO-2,7,10-TRIOXA-4-AZADODECAN-12-OIC...
CAS RN
166108-71-0
Appearance
Purity
1-cyclopentylhydrazine dihydrochloride
CAS RN
645372-27-6
Appearance
White solid
Purity
>98%
2-(1,3-Dioxoisoindolin-2-yl)ethanesulfonic acid
CAS RN
4443-24-7
Appearance
White crystalline powder
Purity
>98% HPLC
CAS RN
1193-21-1
Appearance
Off white to white solid powder
Purity
>99% HPLC
4-Bromobenzamidine hydrochloride
CAS RN
55368-42-8
Appearance
Off white to white powder
Purity
99%HPLC
CAS RN
491-36-1
Appearance
Off white to white solid powder
Purity
>98% HPLC
6-Oxo-3H-pyrimidine-4-carboxylic acid
CAS RN
6299-87-2
Appearance
Off white to white solid powder
Purity
>98% HPLC
CAS RN
1866-15-5
Appearance
Off white to white crystalline powder
Purity
98%AT
CHLOROGLYOXYLIC ACID METHYL ESTER
CAS RN
5781-53-3
Appearance
Pale yellow transparent liquid
Purity
>97% T
CAS RN
3332-29-4
Appearance
White or yellowish crystals
Purity
98%-103(AT)
Methyl 4-(chlorocarbonyl)butanoate
CAS RN
1501-26-4
Appearance
Yellow liquid
Purity
98%GC
N-(tert-butoxycarbonylamino)phthalimide
CAS RN
34387-89-8
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
CAS RN
116574-71-1
Appearance
White to almost white crystalline powder
Purity
97% HPLC
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
(R)-4-bebzyloxymethyl-2,2-dimethyl-1,3-dioxolane
CAS RN
14347-83-2
Appearance
Pale yellow to colorless liquid
Purity
98% HPLC
CAS RN
26690-80-2
Appearance
Colorless Transparent Liquid
Purity
96% GC
2-amino-N-isopropylbenzenesulfonamide
CAS RN
761435-31-8
Appearance
Off white to white solid or liquid
Purity
98% HPLC
2-Chloro-1,3-bis(dimentylamino)trimethinium...
CAS RN
249561-98-6
Appearance
Off white to white solid
Purity
98.0% HPLC
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