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89347-14-8

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89347-14-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 89347-14-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,3,4 and 7 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 89347-14:
(7*8)+(6*9)+(5*3)+(4*4)+(3*7)+(2*1)+(1*4)=168
168 % 10 = 8
So 89347-14-8 is a valid CAS Registry Number.

89347-14-8Downstream Products

89347-14-8Relevant articles and documents

LONG-ACTING CONTRACEPTIVE AGENTS: NORETHISTERONE ESTERS OF ARYLCARBOXYLIC ACIDS

Wan, A. S. C.,Ngiam, T. L.,Leung, S. L.,Go, M. L.,Heng, P. W. S.,et al.

, p. 309 - 320 (2007/10/02)

The synthesis of esters of norethisterone (17α-ethynyl-17β-hydroxyestr-4-en-3-one) with acids containing a benzene ring is described, two methods of esterification being compared in terms of yield and convenience.The activities of these esters as long-acting contraceptive agents have been evaluated.

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