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ChemSpider 2D Image | BQ-788 | C34H50N5NaO7

Image result for bq-788

Image result for bq-788


  • Molecular FormulaC34H50N5NaO7
  • Average mass663.780 Da

SP ROT +3.8 ° Conc: 1.032 g/100mL; methanol; Wavlenght: 589.3 nm, Development of an efficient strategy for the synthesis of the ETB receptor antagonist BQ-788 and some related analogues
Peptides (New York, NY, United States) (2005), 26, (8), 1441-1453.,

FOR FREE FORM +19.6 °, Conc: 0.998 g/100mL; : N,N-dimethylformamide; 589.3 nm

CAS 156161-89-6 [RN]
CAS 173326-37-9 FREE ACID
BQ 788 sodium salt
D-Norleucine, N-(((2R,6S)-2,6-dimethyl-1-piperidinyl)carbonyl)-4-methyl-L-leucyl-1-(methoxycarbonyl)-D-tryptophyl-, monosodium salt
D-Norleucine, N-((cis-2,6-dimethyl-1-piperidinyl)carbonyl)-4-methyl-L-leucyl-1-(methoxycarbonyl)-D-tryptophyl-, monosodium salt
D-Norleucine, N-[[(2R,6S)-2,6-dimethyl-1-piperidinyl]carbonyl]-4-methyl-L-leucyl-1-(methoxycarbonyl)-D-tryptophyl-, sodium salt (1:1)
N-[N-[N-[(2,6-Dimethyl-1-piperidinyl)carbonyl]-4-methyl-L-leucyl]-1-(methoxycarbonyl)-D-tryptophyl]-D-norleucine sodium salt
Sodium N-{[(2R,6S)-2,6-dimethylpiperidin-1-yl]carbonyl}-4-methyl-L-leucyl-N-[(1R)-1-carboxylatopentyl]-1-(methoxycarbonyl)-D-tryptophanamide

BQ-788 is a selective ETB antagonist.[1]

presumed to be under license from Banyu , was investigating BQ-788, a selective endothelin receptor B (ETRB) antagonist, for treating metastatic melanoma. By December 2009, the drug was in validation.

Also claimed is their use as an ETBR antagonist and for treating cancers, such as brain cancer, pancreas cancer, colon cancer, breast cancer, ovary cancer, prostate cancer, glioblastoma, solid tumor, melanoma and squamous cell carcinoma. Represent a first filing from ENB Therapeutics Inc and the inventors on these deuterated forms of BQ-788. Melcure SarL ,


By Brosseau, Jean-Philippe et alFrom Peptides (New York, NY, United States), 26(8), 1441-1453; 2005



N-(cw-2,6-Dimethylpiperidinocarbonyl)-y-methylleucylD-l-(methoxycarbonyl)tryptophanyl-D-norleucine Sodium Salt (1, BQ-788). To a solution of 15 (3.5 g, 5.5 mmol) in methanol (50 mL) was slowly added 5% aqueous NaHCOs (300 mL) over a period of 30 min. The solution was stirred until clarity was achieved (30 min, 23 °C). The solution was diluted with water (200 mL), and the resulting solution was passed through a C18 (60 mL) cartridge preequilbrated in water. BQ-788 (1) was eluted with methanol (2 x 50 mL), concentrated under reduced pressure, resuspended in water (50 mL), and lyophilized to quantitatively yield compound 1 as a white powder:

HPLC £r = 16.4 (gradient A, > 99%);

NMR (400 MHz, DMSO-d6) ó 0.80 (s, 9H), 0.74-0.85 (m, 3H), 1.00 (d, 3H), 1.02 (d, 3H), 1.10-1.25 (m, 6H), 1.30-1.55 (m, 6H), 1.60-1.75 (m, 2H), 2.92 (dd, 1H), 3.12 (dd, 1H), 3.78 (m, 1H), 3.95 (s, 3H), 4.08 (m, 1H), 4.13 (m, 1H), 4.29 (m, 1H), 4.50 (m, 1H), 5.98 (d, 1H), 7.22 (t, 1H), 7.32 (t, 1H), 7.50 (s, 1H), 7.58 (br d, 1H), 7.65 (d, 1H), 8.05 (d, 1H), 8.15 (br d, 1H) ESMS m/z 640.6 (M).



Novel deuterated analogs of a substituted heterocyclic compound, particularly BQ-788 , processes for their preparation and compositions and combinations comprising them are claimed.


Image result for bq-788


By He, John X.; Cody, Wayne L.; Doherty, Annette M., From Journal of Organic Chemistry (1995), 60(25), 8262-6

Journal of medicinal chemistry (1996), 39(12), 2313-30.


  1. ^ Okada, M; Nishikibe, M (Winter 2002). “BQ-788, a selective endothelin ET(B) receptor antagonist”. Cardiovascular drug reviews20 (1): 53–66. PMID 12070534.
Systematic IUPAC name

Sodium N-{[(2R,6S)-2,6-dimethyl-1-piperidinyl]carbonyl}-4-methyl-L-leucyl-N-[(1R)-1-carboxylatopentyl]-1-(methoxycarbonyl)-D-tryptophanamide
3D model (JSmol)
PubChem CID
Molar mass 663.792 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

///////////BQ-788, BQ 788, BQ788, ETBR antagonist, cancers,  brain cancer, pancreas cancer, colon cancer, breast cancer, ovary cancer, prostate cancer, glioblastoma, solid tumor, melanoma, squamous cell carcinoma, PEPTIDE


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DR ANTHONY MELVIN CRASTO, Born in Mumbai in 1964 and graduated from Mumbai University, Completed his Ph.D from ICT, 1991,Matunga, Mumbai, India, in Organic Chemistry, The thesis topic was Synthesis of Novel Pyrethroid Analogues, Currently he is working with AFRICURE PHARMA, ROW2TECH, NIPER-G, Department of Pharmaceuticals, Ministry of Chemicals and Fertilizers, Govt. of India as ADVISOR, earlier assignment was with GLENMARK LIFE SCIENCES LTD, as CONSUlTANT, Retired from GLENMARK in Jan2022 Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 32 plus yrs, Prior to joining Glenmark, he has worked with major multinationals like Hoechst Marion Roussel, now Sanofi, Searle India Ltd, now RPG lifesciences, etc. He has worked with notable scientists like Dr K Nagarajan, Dr Ralph Stapel, Prof S Seshadri, etc, He did custom synthesis for major multinationals in his career like BASF, Novartis, Sanofi, etc., He has worked in Discovery, Natural products, Bulk drugs, Generics, Intermediates, Fine chemicals, Neutraceuticals, GMP, Scaleups, etc, he is now helping millions, has 9 million plus hits on Google on all Organic chemistry websites. His friends call him Open superstar worlddrugtracker. His New Drug Approvals, Green Chemistry International, All about drugs, Eurekamoments, Organic spectroscopy international, etc in organic chemistry are some most read blogs He has hands on experience in initiation and developing novel routes for drug molecules and implementation them on commercial scale over a 32 PLUS year tenure till date Feb 2023, Around 35 plus products in his career. He has good knowledge of IPM, GMP, Regulatory aspects, he has several International patents published worldwide . He has good proficiency in Technology transfer, Spectroscopy, Stereochemistry, Synthesis, Polymorphism etc., He suffered a paralytic stroke/ Acute Transverse mylitis in Dec 2007 and is 90 %Paralysed, He is bound to a wheelchair, this seems to have injected feul in him to help chemists all around the world, he is more active than before and is pushing boundaries, He has 100 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 100 Lakh plus views on dozen plus blogs, 227 countries, 7 continents, He makes himself available to all, contact him on +91 9323115463, email, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 38 lakh plus views on New Drug Approvals Blog in 227 countries...... , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc He has total of 32 International and Indian awards

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