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685563-27-3

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685563-27-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 685563-27-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,5,5,6 and 3 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 685563-27:
(8*6)+(7*8)+(6*5)+(5*5)+(4*6)+(3*3)+(2*2)+(1*7)=203
203 % 10 = 3
So 685563-27-3 is a valid CAS Registry Number.

685563-27-3Relevant articles and documents

Anti-HIV-1 activity of pyrryl aryl sulfone (PAS) derivatives: Synthesis and SAR studies of novel esters and amides at the position 2 of the pyrrole nucleus

Silvestri, Romano,Artico, Marino,La Regina, Giuseppe,De Martino, Gabriella,La Colla, Massimiliano,Loddo, Roberta,La Colla, Paolo

, p. 201 - 210 (2007/10/03)

A SAR study has been performed in order to evaluate how much the ester function could be a determinant for the anti-human immunodeficiency virus type-1 activity of pyrryl aryl sulfones (PASs), a potent family of non-nucleoside reverse transcriptase (RT) inhibitors discovered in the last years. Twenty-three new esters were prepared with the aim to enhance the inhibitory potency of 4a and 4c, two PAS agents endowed with good activity (EC50 = 0.14 μM) and deprived of cytotoxicity up to >200 μM. None of test derivatives was as potent as 4a and 4c and lacked of selectivity due to their higher cytotoxicity (compounds 22-25). Antiviral activity correlate with an ester ramified chain.

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