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91735-53-4

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91735-53-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91735-53-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,3 and 5 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 91735-53:
(7*9)+(6*1)+(5*7)+(4*3)+(3*5)+(2*5)+(1*3)=144
144 % 10 = 4
So 91735-53-4 is a valid CAS Registry Number.

91735-53-4Relevant articles and documents

Synthesis of Barbigerone, a Naturally Occurring Pyranoisoflavone

Pathak, V. P.,Saini, T. R.,Khanna, R. N.

, p. 89 - 90 (2007/10/02)

4'-Benzyloxy-2'-hydroxy-2,4,5-trimethoxychalcone (III) on benzylation gives 2',4'-dibenzyloxy-2,4,5-trimethoxychalcone (IV), which on epoxidation furnishes the corresponding epoxide (V).The latter on rearrangement with BF3-etherate gives 7-hydroxy-2',4',5'-trimethoxyisoflavone (II), via α-formyldesoxybenzoin (VI).II on reaction with 2-methyl-2-chlorobut-3-yne furnishes barbigerone (I), identical with a natural sample.

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