83681-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 83681-20-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,6,8 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 83681-20:
(7*8)+(6*3)+(5*6)+(4*8)+(3*1)+(2*2)+(1*0)=143
143 % 10 = 3
So 83681-20-3 is a valid CAS Registry Number.
83681-20-3Relevant academic research and scientific papers
New Synthesis of Azabufalin from C-17 Steroidal Ketones
Shiao, Min-Jen
, p. 5189 - 5191 (2007/10/02)
A new and superior method for the conversion of the appropriate steroidal pyridyl derivatives into azabufalin by using the known 2-(benzyloxy)pyridyl bromide at the 17-ketone is reported.
