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643027-53-6

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643027-53-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 643027-53-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,3,0,2 and 7 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 643027-53:
(8*6)+(7*4)+(6*3)+(5*0)+(4*2)+(3*7)+(2*5)+(1*3)=136
136 % 10 = 6
So 643027-53-6 is a valid CAS Registry Number.

643027-53-6Relevant articles and documents

Phenyl ethers from cultured lichen mycobionts of Graphis scripta var. serpentina and G. rikuzensis.

Takenaka, Yukiko,Tanahashi, Takao,Nagakura, Naotaka,Hamada, Nobuo

, p. 794 - 797 (2007/10/03)

Spore-derived mycobionts of the lichen Graphis scripta var. serpentina and G. rikuzensis were cultivated on a malt-yeast extract medium supplemented with 10% sucrose and their metabolites were investigated. 3,3'-Dihydroxy-5,5'-dimethyldiphenyl ether was isolated from the cultures of the mycobionts of G. scripta var. serpentina, while a new phenyl ether, rikuzenol, along with two known diphenyl ethers, violaceol-I and violaceol-II, were isolated from those of G. rikuzensis. The structure of the new compound was determined by spectroscopic methods. Violaceol-I was chemically synthesized and interconversion between violaceol-I and violaceol-II was proven.

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