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1262536-09-3

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1262536-09-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1262536-09-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,6,2,5,3 and 6 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1262536-09:
(9*1)+(8*2)+(7*6)+(6*2)+(5*5)+(4*3)+(3*6)+(2*0)+(1*9)=143
143 % 10 = 3
So 1262536-09-3 is a valid CAS Registry Number.

1262536-09-3Relevant articles and documents

Synthesis and antibacterial activity of a novel class of 15-membered macrolide antibiotics, "11a-Azalides"

Sugimoto, Tomohiro,Tanikawa, Tetsuya

, p. 234 - 237 (2011/04/26)

An efficient method for the reconstruction of the 9-dihydroerythromycin A macrolactone skeleton has been established. The key steps are oxidative cleavage at the 11,12-position and reconstruction after insertion of an appropriate functionalized amino alcohol. Novel 15-membered macrolides, we named as "11a-azalides", were synthesized based on the above methodology and evaluated for their antibacterial activity. Among them, (13R)-benzyloxymethyl- 11a-azalide showed the most potent Streptococcus pneumoniae activity, with improved activity against a representative erythromycin-resistant strain compared to clarithromycin (CAM).

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