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90618-63-6

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90618-63-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90618-63-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,6,1 and 8 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 90618-63:
(7*9)+(6*0)+(5*6)+(4*1)+(3*8)+(2*6)+(1*3)=136
136 % 10 = 6
So 90618-63-6 is a valid CAS Registry Number.

90618-63-6Relevant articles and documents

Regiospecific (Biogenetic-type) Synthesis of 2-Methyl-5H-pyranobenzopyran-4-one, the Basic Skeleton in Citromycetin

Watanabe, Toshio,Katayama, Sadamu,Nakashita, Yoshihiko,Yamauchi, Masashige

, p. 761 - 762 (1981)

Regiospecific cyclization of the acetal (4g), derived in 5 steps from 2'-benzyloxyacetophenone (3a), gave the pyrone (6a) which was easily converted into 2-methyl-5H-pyranobenzopyran-4-one (1b), the basic skeleton in citromycetin (1a).

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