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644981-53-3

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644981-53-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 644981-53-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,4,9,8 and 1 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 644981-53:
(8*6)+(7*4)+(6*4)+(5*9)+(4*8)+(3*1)+(2*5)+(1*3)=193
193 % 10 = 3
So 644981-53-3 is a valid CAS Registry Number.

644981-53-3Upstream product

644981-53-3Relevant articles and documents

Total syntheses of zaragozic acids A and C by a carbonyl ylide cycloaddition strategy

Hirata, Yuuki,Nakamura, Seiichi,Watanabe, Nobuhide,Kataoka, Osamu,Kurosaki, Takahiro,Anada, Masahiro,Kitagaki, Shinji,Shiro, Motoo,Hashimoto, Shunichi

, p. 8898 - 8925 (2007/10/03)

A carbonyl ylide cycloaddition approach to the squalene synthase inhibitors zaragozic acids A and C is described. The carbonyl ylide precursor 8 was synthesized starting from di-tert-butyl D-tartrate (47) via an eleven-step sequence involving the regiosel

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