680603-35-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 680603-35-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,0,6,0 and 3 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 680603-35:
(8*6)+(7*8)+(6*0)+(5*6)+(4*0)+(3*3)+(2*3)+(1*5)=154
154 % 10 = 4
So 680603-35-4 is a valid CAS Registry Number.
680603-35-4Relevant articles and documents
Synthesis of anthrathiopyrantriones by heterocyclization of alkynoyl derivatives of chloroanthraquinones
Ivanchikova,Shvartsberg
, p. 2303 - 2307 (2007/10/03)
A procedure was developed for the synthesis of 2-substituted, including 2-alkenyl-substituted, 4H-anthra[1,2-b]thiopyran-4,7,12-triones and 4H-anthra[2,3-b]thiopyran-4,6,11-triones by cyclocondensation of vic-alkynoylchloroanthraquinones with Na2/su
