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90664-13-4

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90664-13-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90664-13-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,6,6 and 4 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 90664-13:
(7*9)+(6*0)+(5*6)+(4*6)+(3*4)+(2*1)+(1*3)=134
134 % 10 = 4
So 90664-13-4 is a valid CAS Registry Number.

90664-13-4Relevant articles and documents

Syntheses of (+)-Oudemansin and (+)-Epioudemansin Starting from Enantiomerically Pure Precursors; Absolute Configuration of the Naturally Occuring (-)-Oudemansin

Meyer, Hartmut H.

, p. 791 - 801 (2007/10/02)

The syntheses of the four optically pure methyl (E)-3-hydroxy-2-methyl-5-phenyl-4-pentenoates (+)- and (-)-5 as well as (+)- and (-)-6 were achieved by consecutive methylation and protonation of enolates, starting from (+)- and (-)-4.The esters (+)-6 and

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