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612542-09-3

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612542-09-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 612542-09-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,1,2,5,4 and 2 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 612542-09:
(8*6)+(7*1)+(6*2)+(5*5)+(4*4)+(3*2)+(2*0)+(1*9)=123
123 % 10 = 3
So 612542-09-3 is a valid CAS Registry Number.

612542-09-3Relevant articles and documents

Method for preparing Combretastatin

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Page/Page column 15-16, (2008/06/13)

The invention concerns novel methods for preparing Combretastatin by Wittig condensation between nitromethoxy-benzaldehyde and a trimethoxybenzyl phosphonium salt or inversely a nitromethoxybenzyl phosphonium salt with trimethoxybenzylaldehyde or further by a Wittig reaction on the same derivatives whereof the nitro function has been reduced into an amino group.

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