Methyl (Methyl 3-Deoxy-D-arabino-heptulopyranosid)onate-7-(diphenyl Phosphate), 50mg
₹ 2,65,100.00
- Brand:
Toronto Research Chemicals - Catalog No.:
M320500-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
1-Cyclopropyl-6,7-difluoro-8-methoxy-4-oxo-1,4-dihydroquinoline-3-carboxylic Acid, 50g
₹ 45,392.00
- Brand:
Toronto Research Chemicals - Catalog No.:
C988650-50g - Quantity/Unit: 50g/Pack
- Usually Shipped in: 3-4 Weeks
3-(Trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine Hydrochloride, 50g
₹ 36,212.00
- Brand:
Toronto Research Chemicals - Catalog No.:
T791810-50g - Quantity/Unit: 50g/Pack
- Usually Shipped in: 3-4 Weeks
3,4-Dihydro-6,7-dimethoxy-4-methyl-3-oxo-2-quinoxalinepropanoic Acid Methyl Ester, 50mg
₹ 74,156.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D449075-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
2,3,5-Trimethyl-6-(3,7,11,15-tetramethyl-2-hexadecen-1-yl)-1,4-benzenediol 1,4-Diacetate, 50mg
₹ 2,98,964.00
- Brand:
Toronto Research Chemicals - Catalog No.:
M336235-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(6S)-6-[Ethyl[2-(2-thienyl)ethyl]amino]-5,6,7,8-tetrahydro-1-naphthaleno Hydrochloride, 50mg
₹ 1,31,480.00
- Brand:
Toronto Research Chemicals - Catalog No.:
N136559-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
2-(4-((tert-Butyldimethylsilyl)oxy)-7a-methyloctahydro-1H-inden-1-yl)propan-1-ol, 500mg
₹ 4,36,052.00
- Brand:
Toronto Research Chemicals - Catalog No.:
B943068-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
7-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]-1,2,3,4-tetrahydro-2-methyl-isoquinoline, 50mg
₹ 4,40,540.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D473098-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
2-Fluoro-N-methyl-4-(7-(quinolin-6-ylmethyl)imidazo[1,2-b][1,2,4]triazin-2-yl)benzamide, 50mg
₹ 55,388.00
- Brand:
Toronto Research Chemicals - Catalog No.:
F121860-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
N-(16-(Dimethoxytrityl)oxy-15-hydroxy-4,7,10,13-tetraoxahexadecyl)-D-(+)-biotinamide, 50mg
₹ 69,260.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D446948-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
6-Thioxo-2,5,7,10-tetraazaundecanedioic Acid 1,11-Bis(1,1-dimethylethyl) Ester, 500mg
₹ 80,480.00
- Brand:
Toronto Research Chemicals - Catalog No.:
T385900-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
5-(3,5-bis(Trifluoromethyl)phenyl)-2-(4-bromophenyl)pyrazolo[1,5-a]pyrimidin-7(4H)-one, 50mg
₹ 1,45,556.00
- Brand:
Toronto Research Chemicals - Catalog No.:
T141335-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
5-[3,5-bis(Trifluoromethyl)phenyl]-2-(4-nitrophenyl)pyrazolo[1,5-a]pyrimidin-7(4H)-one, 50mg
₹ 1,45,556.00
- Brand:
Toronto Research Chemicals - Catalog No.:
T141345-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
5-(3,5-bis(Trifluoromethyl)phenyl)-2-(3-bromophenyl)pyrazolo[1,5-a]pyrimidin-7(4H)-one, 50mg
₹ 1,45,556.00
- Brand:
Toronto Research Chemicals - Catalog No.:
T141350-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
6-Defluoro-piperazinyl 7-Depiperazinyl-chloro Norfloxacin Hydrochloride, 50mg
₹ 1,59,632.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D281555-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
N-(1H-Benzimidazol-2-ylmethyl)-N-[(8S)-5,6,7,8-tetrahydro-8-quinolinyl]-1,4-butanediamine, 50mg
₹ 1,73,300.00
- Brand:
Toronto Research Chemicals - Catalog No.:
B201930-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
6,7-Dichloro-1-ethyl-1,4-dihydro-4-oxo-3-quinolinecarboxylic Acid Ethyl Ester, 500mg
₹ 4,12,592.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D438950-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
(R)-5-Chloro-8-methoxy-3-methyl-1-oxo-3,4-dihydro-1H-isochromene-7-carboxylic Acid, 50mg
₹ 61,100.00
- Brand:
Toronto Research Chemicals - Catalog No.:
C596125-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(1S,5S,6R)-5-(Acetyloxy)-7-oxabicyclo[4.1.0]hept-2-ene-3-carboxylic Acid Methyl Ester, 500mg
₹ 3,87,908.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A187745-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
(6S)-2-Nitro-6-((tetrahydro-2H-pyran-2-yl)methoxy)-6,7-dihydro-5H-imidazo[2,1-b][1,3]oxazine, 50mg
₹ 53,144.00
- Brand:
Toronto Research Chemicals - Catalog No.:
N503440-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(1R,4E,9S)-11,11-Dimethyl-8-methylenebicyclo[7.2.0]undec-4-ene-4-methanol 4-Acetate, 500mg
₹ 1,17,608.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D464680-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
6,7-Dimethoxy-2-(4-(tetrahydrofuran-2-carbonyl)piperazin-1-yl)quinazolin-4(1H)-one, 500mg
₹ 3,78,728.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D471180-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
2-Amino-7-chloro-1-ethyl-N-methyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxamide, 500mg
₹ 3,01,412.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A603925-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
1-(2,4-Difluorophenyl)-6,7-difluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic Acid, 50mg
₹ 3,39,968.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D445635-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(S)-N-(3-Chloro-4-fluorophenyl)-6-nitro-7-(tetrahydrofuran-3-yloxy)quinazolin-4-amine, 500mg
₹ 43,760.00
- Brand:
Toronto Research Chemicals - Catalog No.:
C367720-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
7-Chloro-6-fluoro-1-(4-fluorophenyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic Acid, 500mg
₹ 1,12,100.00
- Brand:
Toronto Research Chemicals - Catalog No.:
C366355-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
(7-Amino-3-((tetrahydrofuran-2-yl)methyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-5-yl)methanol, 50mg
₹ 61,304.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A617670-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
Blood Bank Refrigerator BR-50 ULTRA up to 72 Blood bags capacity & temperature 4C (LCD)
₹ 2,35,000.00
- Brand:
REMI - Catalog No.:
BR-50ULTRA - Quantity/Unit: 1EA/Box
- Availability: In stock
1-(4-(1-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)vinyl)phenyl)ethanone, 50mg
₹ 1,45,556.00
- Brand:
Toronto Research Chemicals - Catalog No.:
P275500-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
4-[2-(5,6,7,8-Tetrahydro-3,5,5,8,8-pentamethyl-2-naphthalenyl)-2-oxiranyl]benzoic acid, 50mg
₹ 4,52,372.00
- Brand:
Toronto Research Chemicals - Catalog No.:
T294940-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
8,15,22-Trioxo-24-phenyl-23-oxa-7,14,21-triazatetracosanoic Acid Methyl Ester, 500mg
₹ 57,836.00
- Brand:
Toronto Research Chemicals - Catalog No.:
T804408-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
3-Oxo-7-oxa-2,10-diazaspiro[4.6]undecane-10-carboxylic Acid 1,1-Dimethylethyl Ester, 50mg
₹ 77,624.00
- Brand:
Toronto Research Chemicals - Catalog No.:
O846545-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
7-[[(9H-Fluoren-9-ylmethoxy)carbonyl]amino]-4-hydroxy-2-naphthalenesulfonic Acid, 500mg
₹ 3,37,724.00
- Brand:
Toronto Research Chemicals - Catalog No.:
F591770-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
3-Allyl-2-mercapto-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one, 500mg
₹ 1,10,468.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A614538-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
N-Methyl-4,5,6,7-tetrahydro-2H-pyrazolo[4,3-c]pyridine-3-carboxamide Hydrochloride, 50mg
₹ 21,524.00
- Brand:
Toronto Research Chemicals - Catalog No.:
M334248-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
BUFFER CONCENTRATE FOR 500 ml BUFFER SOLUTION pH 7.0+/-0.02 (20C) (Phosphate)- 3 Ampoules
₹ 212.50
₹ 250.00
15% Off
- Brand:
LOBA Chemie - Catalog No.:
2376B03AMP - Quantity/Unit: 3 Ampoules/Pack
- Availability: In stock
(2S,4aR,6aR,7R,9S,10aS,10bR)-2-(3-Furanyl)dodecahydro-6a,10b-dimethyl-9-[(methylsulfonyl)oxy]-4,10-dioxo-2H-Naphtho[2,1-c]pyran-7-carboxylic Acid Methyl Ester, 500g
₹ 11,280.00
- Brand:
Toronto Research Chemicals - Catalog No.:
F863700-500μg - Quantity/Unit: 500?g/Pack
- Usually Shipped in: 3-4 Weeks
[2-(1-Methylethoxy-O)phenylmethyl-C](nitrato-O,O){rel-(2R,5R,7S)-tricyclo[3.3.1.13,7]decane-2,1-diyl[3-(2,4,6-trimethylphenyl)-1-imidazolidinyl-2-ylidene]}ruthenium, 50mg
₹ 33,152.00
- Brand:
Toronto Research Chemicals - Catalog No.:
M138010-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(3S,6R,7S,8S)-11-((2R,3S)-3-((S,E)-2-Azido-3-methyl-4-(2-methylthiazol-4-yl)but-3-en-1-yl)-2-methyloxiran-2-yl)-3,7-dihydroxy-4,4,6,8-tetramethyl-5-oxoundecanoic Acid, 50mg
₹ 1,45,760.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A854510-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
[6R-[6,7(R*)]]-3-[(Acetyloxy)methyl]-7-[[[[(5-carboxy-1H-imidazol-4-yl)carbonyl]amino]phenylacetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid, 50mg
₹ 1,68,200.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A188115-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(6R-cis)-3-[(Acetyloxy)methyl]-7-[[[(cyanomethyl)thio]acetyl]amino]-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid Diphenylmethyl Ester, 50mg
₹ 82,520.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A188125-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
tert-Butyl 4-[6-[[6-(1-Butoxyethenyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-yl]amino]-pyridin-3-yl]-piperazine-1-carboxylate, 50mg
₹ 61,100.00
- Brand:
Toronto Research Chemicals - Catalog No.:
B750192-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
N-[[7-(Aminosulfonyl)-6-chloro-2,3-dihydro-1,1-dioxo-4H-1,2,4-benzothiadiazin-4-yl]methyl]-6-chloro-3,4-dihydro-1,1-dioxo-2H-1,2,4-benzothiadiazine-7-sulfonamide, 50mg
₹ 7,61,840.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A629375-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
3-Amino-2-(4-(((5aR,6S)-6-methoxy-1,7-dioxo-1,3,4,5a,6,7-hexahydroazeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)carbamoyl)-1,3-dithietan-2-ylidene)-3-oxopropanoic Acid, 50mg
₹ 31,00,700.00
- Brand:
Toronto Research Chemicals - Catalog No.:
A612025-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(6R,7R)--[(1Z)-2-(2,4-Dinitrophenyl)ethenyl]-8-oxo-7-[(2-thienylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid (4-Methoxyphenyl)methyl Ester, 50mg
₹ 1,91,660.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D480268-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
[[(6R,7R)-2-[[(4-Methoxyphenyl)methoxy]carbonyl]-8-oxo-7-[(2-thienylacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]triphenyl-phosphonium Iodide, 50mg
₹ 1,02,920.00
- Brand:
Toronto Research Chemicals - Catalog No.:
M266435-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
(1,4b,10)-10-Methyl 7-(Hydroxy)-1-methyl-8-methylene-Gibb-4-ene-1,10-dicarboxylic Acid Ester, 500mg
₹ 4,36,052.00
- Brand:
Toronto Research Chemicals - Catalog No.:
M309290-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
cis-Dispiro[cyclohexane-1,3'-[1,2,4]trioxolane-5',2''-tricyclo[3.3.1.13,7]decane]-4-acetic Acid, 50mg
₹ 4,80,524.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D784595-50mg - Quantity/Unit: 50mg/Pack
- Usually Shipped in: 3-4 Weeks
![2-[7-(Diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-5-benzoxazolesulfonic Acid Sodium Salt, 500mg](data:image/gif;base64,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)
2-[7-(Diethylamino)-2-oxo-2H-1-benzopyran-3-yl]-5-benzoxazolesulfonic Acid Sodium Salt, 500mg
₹ 1,12,916.00
- Brand:
Toronto Research Chemicals - Catalog No.:
D443705-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks
2-Chloro-n-[3-cyano-6-(1,1-dimethylpropyl)-4,5,6,7-tetrahydro-1-benzothien-2-yl]acetamide, 500mg
₹ 65,996.00
- Brand:
Toronto Research Chemicals - Catalog No.:
C363665-500mg - Quantity/Unit: 500mg/Pack
- Usually Shipped in: 3-4 Weeks