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691871-71-3

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691871-71-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 691871-71-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,8,7 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 691871-71:
(8*6)+(7*9)+(6*1)+(5*8)+(4*7)+(3*1)+(2*7)+(1*1)=203
203 % 10 = 3
So 691871-71-3 is a valid CAS Registry Number.

691871-71-3Downstream Products

691871-71-3Relevant articles and documents

Synthesis and SAR of tetracyclic pyrroloquinolones as phosphodiesterase 5 inhibitors

Jiang, Weiqin,Alford, Vernon C.,Qiu, Yuhong,Bhattacharjee, Sheela,John, T. Matthew,Haynes-Johnson, Donna,Kraft, Patricia J.,Lundeen, Scott G.,Sui, Zhihua

, p. 1505 - 1515 (2004)

The synthesis of the fused tetracyclic pyrroloquinolones 9a-i in four steps is described. The PDE5 inhibitory activities of these compounds, their selectivities against PDE1, PDE2, PDE3, PDE4 and PDE6, the preclinical pharmacokinetic assessments and the in vivo efficacy in increasing intracavernosal pressure are presented and discussed.

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