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427888-21-9

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427888-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 427888-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,7,8,8 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 427888-21:
(8*4)+(7*2)+(6*7)+(5*8)+(4*8)+(3*8)+(2*2)+(1*1)=189
189 % 10 = 9
So 427888-21-9 is a valid CAS Registry Number.

427888-21-9Relevant articles and documents

A new stereocontrolled synthesis of uncommon tripeptides derived from 2,6-diaminopimelic acid (2,6-DAP)

Paradisi, Francesca,Porzi, Gianni,Sandri, Sergio

, p. 3319 - 3324 (2007/10/03)

The stereocontrolled synthesis of uncommon tripeptides 8 and 11a-c, structural variants of 2,6-diaminopimelic acid, was carried out starting from the mono-lactim ether 1 easily obtained from L-valine. The configurations of the introduced stereogenic centers were assigned on the basis of 1H NMR spectroscopic data.

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