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78661-18-4

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78661-18-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 78661-18-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,6,6 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 78661-18:
(7*7)+(6*8)+(5*6)+(4*6)+(3*1)+(2*1)+(1*8)=164
164 % 10 = 4
So 78661-18-4 is a valid CAS Registry Number.

78661-18-4Downstream Products

78661-18-4Relevant articles and documents

Approches to the synthesis of triterpenoids. VI. The synthesis of 3,3,10aβ-trimethyl-1,2,3,4,4aβ,5,8,9,10,10a-decahydrophenantren-7(6H)-one, a potential intermediate for pentacyclic triterpene synthesis

Apsimon, John W.,Moir, David,Yamasaki, Kazuyuki

, p. 1010 - 1017 (2007/10/02)

Investigation of the CDE ring construction of naturally occuring triterpenoids are described.The efficient synthesis of 3,3,10aβ-trimethyl-1,2,3,4,4aβ,5,8,9,10,10aβ-decahydrophenantren-7(6H)-one (25) has been achieved.The D/E ring junction of the molecule

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