154221-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 154221-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,4,2,2 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 154221-21:
(8*1)+(7*5)+(6*4)+(5*2)+(4*2)+(3*1)+(2*2)+(1*1)=93
93 % 10 = 3
So 154221-21-3 is a valid CAS Registry Number.
154221-21-3Relevant articles and documents
Highly Diastereoselective Synthesis of (-)-Petasinecine via Ireland-Claisen-Type Rearrangement
Mulzer, Johann,Shanyoor, Mazin
, p. 6545 - 6548 (1993)
A Highly diastereoselective synthesis of petasinecine from L-proline via an Ireland-Claisen-type rearrangement (5->7; Scheme 1) is described.Keywords: necine base, petasinecine, L-proline, Ireland-Claisen-type rearrangement