138058-33-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138058-33-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,0,5 and 8 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138058-33:
(8*1)+(7*3)+(6*8)+(5*0)+(4*5)+(3*8)+(2*3)+(1*3)=130
130 % 10 = 0
So 138058-33-0 is a valid CAS Registry Number.
138058-33-0Relevant articles and documents
CYCLIZATION OF N-(2-R-1-ANTHRAQUINONYL)UREAS TO ANTHRAPYRIMIDINE DERIVATIVES
Savel'ev, V. A.,Loskutov, V. A.
, p. 621 - 623 (2007/10/02)
3-Phenyl-1H-naphthoquinazoline-2,4,7,12-tetrone and 3-phenyl-4-benzylidene-1H-naphthoquinazoline-2,7,12-trione were synthesized by intramolecular cyclization in the KOH-DMSO system of anthraquinonylureas with a phenylethynyl or carboxy group