123007-40-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 123007-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,0,0 and 7 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 123007-40:
(8*1)+(7*2)+(6*3)+(5*0)+(4*0)+(3*7)+(2*4)+(1*0)=69
69 % 10 = 9
So 123007-40-9 is a valid CAS Registry Number.
123007-40-9Relevant articles and documents
Synthesis of 11- and 12-Methylestrones via the Thermal Elimination of β-Ketosulfoxides
Kurosawa, Takao,Tohma, Masahiko
, p. 4284 - 4292 (2007/10/02)
The bicyclic enones (3 and 14) and the triketone (17), key intermediates for the synthesis of 11- and 12-methylestrones, were prepared by means of the thermal elimination of the β-ketosulfoxides (1 and 12).By a modification of Smith's estrone synthesis, 3