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81155-13-7

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81155-13-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81155-13-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,1,5 and 5 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 81155-13:
(7*8)+(6*1)+(5*1)+(4*5)+(3*5)+(2*1)+(1*3)=107
107 % 10 = 7
So 81155-13-7 is a valid CAS Registry Number.

81155-13-7Relevant articles and documents

ISOLATION AND SYNTHESIS OF 2''-N-FORMIMIDOYLISTAMYCINS A AND B, NEW ISTAMYCIN COMPONENTS

Horiuchi, Yukio,Ikeda, Daishiro,Gomi, Shuichi,Kondo, Shinichi,Umezawa, Hamao

, p. 25 - 32 (1982)

Two new istamycin components have been isolated from culture filtrates of Streptomyces tenjimariensis.Their structures were suggested to be 2''-N-formimidoylistamycins A and B by spectral analysis, and confirmed by synthesis starting from istamycins Asub

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