139781-12-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139781-12-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,8 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 139781-12:
(8*1)+(7*3)+(6*9)+(5*7)+(4*8)+(3*1)+(2*1)+(1*2)=157
157 % 10 = 7
So 139781-12-7 is a valid CAS Registry Number.
139781-12-7Relevant articles and documents
Synthesis, reactions, and CNS-activities of 6,7-annulated 8-oxatropane derivatives
Eiden,Kainz,Gebhard
, p. 77 - 82 (1992)
The butadiene derivatives 10a-c react with the oxa-bicyclooctanone 9 to give the cyclohexene annulated oxatropanes 11a-c. The acetoxyderivatives 11b and 11c can be transformed into the cyclohexadiene or benzene derivatives 13 and 12, respectively. 11a rea