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133761-71-4

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133761-71-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133761-71-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,7,6 and 1 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 133761-71:
(8*1)+(7*3)+(6*3)+(5*7)+(4*6)+(3*1)+(2*7)+(1*1)=124
124 % 10 = 4
So 133761-71-4 is a valid CAS Registry Number.

133761-71-4Relevant articles and documents

An efficient synthetic pathway to the macroline-type indole alkaloids, talcarpine and alstonerine from ajmaline

Takayama, Hiromitsu,Phisalaphong, Chada,Kitajima, Mariko,Aimi, Norio,Sakai, Shin-Ichiro

, p. 1383 - 1392 (2007/10/09)

Ajmaline (6) was transformed into two macroline-related indole alkaloids, talcarpine (1) and alstonerine (2) via the common synthetic intermediate (13). The stereochemistry at C19 position in talcarpine (1) and talpinine (5) were elucidated by NOE experim

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