L 756423

We are open as normal during COVID-19 pandemic. Order online, same day shipping out.

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 596706

CAS#: 216863-66-0

Description: L 756423 is a HIV Protease Inhibitor.

Price and Availability

Size Price Shipping out time Quantity
Inquire bulk and customized quantity

Pricing updated 2020-07-07. Prices are subject to change without notice.

L 756423 is not in stock, may be available through custom synthesis. For cost-effective reason, minimum 1 gram order is requested. The product will be characterized by NMR, HPLC and MS analysis. Purity (HPLC) is usually >98%. CoA, QC data, MSDS will be provided when product is successfully made. The estimated lead time is 2-3 months. Please send email to sales@medkoo.com to inquire quote.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 596706
Name: L 756423
CAS#: 216863-66-0
Chemical Formula: C39H48N4O5
Exact Mass: 652.3625
Molecular Weight: 652.83
Elemental Analysis: C, 71.75; H, 7.41; N, 8.58; O, 12.25

Synonym: L 756423; L-756423; L756423; MK 944a; MK-944a; MK944a;

IUPAC/Chemical Name: (S)-4-(benzofuran-2-ylmethyl)-1-((2S,4R)-4-benzyl-2-hydroxy-5-(((1S,2R)-2-hydroxy-2,3-dihydro-1H-inden-1-yl)amino)-5-oxopentyl)-N-(tert-butyl)piperazine-2-carboxamide


InChi Code: InChI=1S/C39H48N4O5/c1-39(2,3)41-38(47)33-25-42(24-31-21-28-14-8-10-16-35(28)48-31)17-18-43(33)23-30(44)20-29(19-26-11-5-4-6-12-26)37(46)40-36-32-15-9-7-13-27(32)22-34(36)45/h4-16,21,29-30,33-34,36,44-45H,17-20,22-25H2,1-3H3,(H,40,46)(H,41,47)/t29-,30+,33+,34-,36+/m1/s1

SMILES Code: CC(C)(C)NC([C@H](CN(CC1)Cc2oc3ccccc3c2)N1C[C@@H](O)C[C@H](C(N[C@@H]4[C@H](O)Cc5ccccc54)=O)Cc6ccccc6)=O

Technical Data

Solid powder

>98% (or refer to the Certificate of Analysis)

Shipping Condition:
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition:
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Soluble in DMSO

Shelf Life:
>2 years if stored properly

Drug Formulation:
This drug may be formulated in DMSO

Stock Solution Storage:
0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code:


1: Rose MJ, Merschman SA, Eisenhandler R, Woolf EJ, Yeh KC, Lin L, Fang W, Hsieh J, Braun MP, Gatto GJ, Matuszewski BK. High-throughput simultaneous determination of the HIV protease inhibitors indinavir and L-756423 in human plasma using semi-automated 96-well solid phase extraction and LC-MS/MS. J Pharm Biomed Anal. 2000 Dec 15;24(2):291-305. PubMed PMID: 11130208.

2: Dorsey BD, McDonough C, McDaniel SL, Levin RB, Newton CL, Hoffman JM, Darke PL, Zugay-Murphy JA, Emini EA, Schleif WA, Olsen DB, Stahlhut MW, Rutkowski CA, Kuo LC, Lin JH, Chen IW, Michelson SR, Holloway MK, Huff JR, Vacca JP. Identification of MK-944a: a second clinical candidate from the hydroxylaminepentanamide isostere series of HIV protease inhibitors. J Med Chem. 2000 Sep 7;43(18):3386-99. PubMed PMID: 10978186.

3: Munshi S, Chen Z, Yan Y, Li Y, Olsen DB, Schock HB, Galvin BB, Dorsey B, Kuo LC. An alternate binding site for the P1-P3 group of a class of potent HIV-1 protease inhibitors as a result of concerted structural change in the 80s loop of the protease. Acta Crystallogr D Biol Crystallogr. 2000 Apr;56(Pt 4):381-8. PubMed PMID: 10739910.

4: Rose MJ, Merschman SA, Woolf EJ, Matuszewski BK. Determination of L-756 423, a novel HIV protease inhibitor, in human plasma and urine using high-performance liquid chromatography with fluorescence detection. J Chromatogr B Biomed Sci Appl. 1999 Sep 24;732(2):425-35. PubMed PMID: 10517365.