221007-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221007-57-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,0 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 221007-57:
(8*2)+(7*2)+(6*1)+(5*0)+(4*0)+(3*7)+(2*5)+(1*7)=74
74 % 10 = 4
So 221007-57-4 is a valid CAS Registry Number.
221007-57-4Relevant academic research and scientific papers
Asymmetric synthesis of dienomycin C
Comins,Green
, p. 217 - 218 (2007/10/03)
The first asymmetric synthesis of dienomycin C was accomplished in seven Steps and 46% overall yield.