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121667-71-8

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121667-71-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 121667-71-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,6,6 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 121667-71:
(8*1)+(7*2)+(6*1)+(5*6)+(4*6)+(3*7)+(2*7)+(1*1)=118
118 % 10 = 8
So 121667-71-8 is a valid CAS Registry Number.

121667-71-8Relevant articles and documents

Antifertility Agents: A Synthetic Entry to Yuehchukene Analogues; Stereoselective Synthesis of 7,7-Bis-nor-yuehchukene via 9-Methyl-6-oxo-6aβ-7,8,10aβ-tetrahydroindenoindole

Cheng, Kin-Fai,Chan, Tin-Tau,Lai, Ting-Fong,Kong, Yun-Cheung

, p. 3317 - 3322 (2007/10/02)

Intermolecular Diels-Alder reaction and polyphosphate ester-catalysed intramolecular acylation are used in a synthetic approach to 9-methyl-6-oxo-6aβ-7,8,10aβ-tetrahydroindenolindole (15),the basic structure of the antifertility agent yuehchukene (

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