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900519-21-3

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900519-21-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 900519-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,0,0,5,1 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 900519-21:
(8*9)+(7*0)+(6*0)+(5*5)+(4*1)+(3*9)+(2*2)+(1*1)=133
133 % 10 = 3
So 900519-21-3 is a valid CAS Registry Number.

900519-21-3Relevant articles and documents

Unified total synthesis of pteriatoxins and their diastereomers

Matsuura, Fumiyoshi,Peters, Rene,Anada, Masahiro,Harried, Scott S.,Hao, Junliang,Kishi, Yoshito

, p. 7463 - 7465 (2007/10/03)

A unified total synthesis is reported to access all of the possible diastereomers of pteriatoxins A-C, with the use of an intramolecular Diels-Alder reaction as the key step to form the carbo-macrocyclic core structure. The C34/C35-diol protecting groups were found to have significant effects on both the exo/endo-selectivity and the exo-facial selectivity of the intramolecular Diels-Alder process. Copyright

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