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91649-60-4

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91649-60-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91649-60-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,4 and 9 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91649-60:
(7*9)+(6*1)+(5*6)+(4*4)+(3*9)+(2*6)+(1*0)=154
154 % 10 = 4
So 91649-60-4 is a valid CAS Registry Number.

91649-60-4Upstream product

91649-60-4Downstream Products

91649-60-4Relevant articles and documents

Microbial and Mammalian Stereoselective Conversion of 4-Demethoxydaunorubicin to the Corresponding 13-(R)-Dihydro Derivative

Cassinelli, Giuseppe,Grein, Arpad,Merli, Sergio,Penco, Sergio,Rivola, Giovanni,et al.

, p. 185 - 188 (2007/10/02)

4-Demethoxydaunorubicin (3), a new synthetic antitumor anthracycline under clinical evaluation, was stereoselectively converted to the corresponding 13-(R)-dihydro derivative (4-R) by using a blocked mutant of Streptomyces peucetius.The absolute configuration of the C(13) of the new anthracycline 4-R was assigned on the basis of 1H-NMR examination of the 9,13-O-isopropylidene derivative of its aglycone 5-R in comparison with the corresponding C(13) epimers obtained by chemical reduction.Compound 4-R was also identified as the major human urinary metabolite of 3.

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