221004-71-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221004-71-3 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 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221004-71:
(8*2)+(7*2)+(6*1)+(5*0)+(4*0)+(3*4)+(2*7)+(1*1)=63
63 % 10 = 3
So 221004-71-3 is a valid CAS Registry Number.
221004-71-3Relevant articles and documents
Approach towards the total synthesis of cyclopeptide alkaloids
Laib, Taoues,Zhu, Jieping
, p. 283 - 286 (2007/10/03)
Macrocylization via formation of aryl-alkyl ether bond was a key step in a model synthesis of 14-membered cyclopeptide alkaloids. A new chemoenzymatic synthesis of chiral 2-amino-1-arylethanol was developed in the course of this study.