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203387-47-7

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203387-47-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 203387-47-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,3,8 and 7 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 203387-47:
(8*2)+(7*0)+(6*3)+(5*3)+(4*8)+(3*7)+(2*4)+(1*7)=117
117 % 10 = 7
So 203387-47-7 is a valid CAS Registry Number.

203387-47-7Relevant articles and documents

Studies directed towards the total synthesis of the antibiotic macrodiolide tartrolon: EPC synthesis of the protected seco acid

Mulzer, Johann,Berger, Markus

, p. 803 - 806 (2007/10/03)

An efficient synthesis of the protected seco acid 2 of the antibiotic macrodiolide tartrolon 1 is described. Key steps are a substrate controlled aldol-reaction, a Johnson-Claisen rearrangement, and a Horner-Wadsworth-Emmons olefination with subsequent Co

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