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101666-32-4

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101666-32-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 101666-32-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,1,6,6 and 6 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 101666-32:
(8*1)+(7*0)+(6*1)+(5*6)+(4*6)+(3*6)+(2*3)+(1*2)=94
94 % 10 = 4
So 101666-32-4 is a valid CAS Registry Number.

101666-32-4Relevant articles and documents

CHEMICAL MODIFICATION OF ERYTHROMYCINS. VIII. A NEW EFFECTIVE ROUTE TO CLARITHROMYCIN (6-O-METHYLERYTHROMYCIN A)

Watanabe, Yoshiaki,Adachi, Takashi,Asaka, Toshifumi,Kashimura, Masato,Morimoto, Shigeo

, p. 2121 - 2124 (2007/10/02)

Selective O-methylation of the C-6 hydroxyl group of erythromycin A could be satisfactorily achieved by using its 9-oxime derivatives as the starting materials.Thus, 6-O-methylerythromycin A (clarithromycin) was synthesized from 2'-O-,3'-N-bis(benzyloxycarbonyl)-N-demethylerythromycin A via its 9-oxime derivative by 6 steps.

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