Cas 668990-41-8,C61H113NO13Si3

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Check Digit Verification of cas no

The CAS Registry Mumber 668990-41-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,8,9,9 and 0 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 668990-41:
(8*6)+(7*6)+(6*8)+(5*9)+(4*9)+(3*0)+(2*4)+(1*1)=228
228 % 10 = 8
So 668990-41-8 is a valid CAS Registry Number.

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668990-41-8Relevant academic research and scientific papers

Selective transformation of ascomycin into 11-epi-ascomycin

Baumann, Karl,Bacher, Markus,Damont, Annelaure,Steck, Andrea

, p. 549 - 551 (2007/10/03)

Within the binding domain, ascomycin features the unusual pattern of a masked tricarbonyl moiety, which potentially allows for high structural diversity via simple isomerisation events. A cascade of diastereoselective rearrangement reactions at the binding domain, allowing the conversion of ascomycin into 11-epi-ascomycin is herein reported.

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