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304858-62-6

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304858-62-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 304858-62-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,4,8,5 and 8 respectively; the second part has 2 digits, 6 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 304858-62:
(8*3)+(7*0)+(6*4)+(5*8)+(4*5)+(3*8)+(2*6)+(1*2)=146
146 % 10 = 6
So 304858-62-6 is a valid CAS Registry Number.

304858-62-6Relevant articles and documents

CCR5 antagonists as anti-HIV-1 agents. 1. Synthesis and biological evaluation of 5-oxopyrrolidine-3-carboxamide derivatives

Imamura, Shinichi,Ishihara, Yuji,Hattori, Taeko,Kurasawa, Osamu,Matsushita, Yoshihiro,Sugihara, Yoshihiro,Kanzaki, Naoyuki,Iizawa, Yuji,Baba, Masanori,Hashiguchi, Shohei

, p. 63 - 73 (2007/10/03)

A novel lead compound, N-{3-[4-(4-fluorobenzoyl)piperidin-1-yl]propyl}-1- methyl-5-oxo-N-phenylpyrrolidine-3-carboxamide (1), was identified as a CCR5 antagonist by high-throughput screening using [125I]RANTES and CCR5-expressing CHO cells. The IC50 value of 1 was 1.9 μM. In an effort to improve the binding affinity of 1, a series of 5-oxopyrrolidine-3- carboxamides was synthesized. Introduction of 3,4-dichloro substituents to the central phenyl ring (10i, IC50=0.057 μM; 11b, IC 50=0.050 μM) or replacing the 1-methyl group of the 5-oxopyrrolidine moiety with a 1-benzyl group (12e, IC50=0.038 μM) was found to be effective for improving CCR5 affinity. Compound 10i, 11b, and 12e also inhibited CCR5-using HIV-1 envelope-mediated membrane fusion with IC50 values of 0.44, 0.19, and 0.49 μM, respectively.

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