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113661-31-7

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113661-31-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113661-31-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,6,6 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 113661-31:
(8*1)+(7*1)+(6*3)+(5*6)+(4*6)+(3*1)+(2*3)+(1*1)=97
97 % 10 = 7
So 113661-31-7 is a valid CAS Registry Number.

113661-31-7Relevant articles and documents

Synthetic Studies Relevant to Biosynthetic Research on Vitamin B12. Part 5. Synthesis of (RS)-Ring-B Imide

Battersby, Alan R.,Westwood, Steven W.

, p. 1679 - 1688 (2007/10/02)

Future biosynthetic research on vitamin B12 depends on the synthesis of a family of isobacteriochlorin pigments.A key building block required for this work is 2-(2-methoxycarbonylethyl)-3-methoxycarbonylmethyl-3-methylsuccinimide, usually called the ring-B imide.A practical synthesis of the racemic form of this substance is described which can yield multigramme quantities of product.

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