Cas 19772-83-9,(Z,Z)-bis-(3,4-dimethoxybenzylidene)succinic anhydride

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Check Digit Verification of cas no

The CAS Registry Mumber 19772-83-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,7,7 and 2 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 19772-83:
(7*1)+(6*9)+(5*7)+(4*7)+(3*2)+(2*8)+(1*3)=149
149 % 10 = 9
So 19772-83-9 is a valid CAS Registry Number.

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19772-83-9Relevant academic research and scientific papers

Rotamers and Isomers in the Fulgide Series. Part 1. Stereochemistry and Conformational Analysis of Bis-(3,4-dimethoxybenzylidene)succinic Anhydrides by X-Ray Crystallography and Molecular Mechanics

Boeyens, Jan C. A.,Denner, Louis,Perold, Guido W.

, p. 1749 - 1758 (1988)

Conformational analysis of bis-(3,4-dimethoxybenzylidene)succinic anhydride suggests that in addition to a Z,Z-isomer, the E,E-isomer of this diarylfulgide occurs as three distinct relatively freely interconvertible chiral rotamers and their enantiomers.T

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