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56974-44-8

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56974-44-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56974-44-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,9,7 and 4 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 56974-44:
(7*5)+(6*6)+(5*9)+(4*7)+(3*4)+(2*4)+(1*4)=168
168 % 10 = 8
So 56974-44-8 is a valid CAS Registry Number.

56974-44-8Relevant articles and documents

Optically active total synthesis of calphostin D

Hauser,Sengupta,Corlett

, p. 1967 - 1969 (1994)

An optically active total synthesis of calphostin D (1a) through dimerization of the chiral o-naphthoquinone 6 has been accomplished. The mechanism of the dimerization has been shown to be an acid-catalyzed process.

Total synthesis of phleichrome, calphostin A, and calphostin D. Unusual stereoselective and stereospecific reactions in the synthesis of perylenequinones

Broka

, p. 859 - 862 (2007/10/02)

This report describes the total synthesis of phleichrome, calphostin A and calphostin D - three protein kinase C inhibitory perylenequinones. The present route affords the targets in enantiomerically pure form and represents the first successful approach

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