197916-09-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 197916-09-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,9,1 and 6 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 197916-09:
(8*1)+(7*9)+(6*7)+(5*9)+(4*1)+(3*6)+(2*0)+(1*9)=189
189 % 10 = 9
So 197916-09-9 is a valid CAS Registry Number.
197916-09-9Relevant articles and documents
Total synthesis of tricolorin A
Larson, Daniel P.,Heathcock, Clayton H.
, p. 8406 - 8418 (2007/10/03)
Tricolorin A (1) is a novel tetrasaccharide macrolactone that is a natural herbicide. In this paper is reported a total synthesis of 1. Coupling of hydroxy ester 18 with D-fucosyl trichloroacetimidate 23 gave fucoside 24. Removal of he C-2 pivaloyl group