137985-54-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137985-54-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,9,8 and 5 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 137985-54:
(8*1)+(7*3)+(6*7)+(5*9)+(4*8)+(3*5)+(2*5)+(1*4)=177
177 % 10 = 7
So 137985-54-7 is a valid CAS Registry Number.
137985-54-7Relevant academic research and scientific papers
Fused Heterocycles, VI: Reactions of 3-Arylidenechromanones and -1-thiochromanones with Thiourea
Levai, Albert
, p. 691 - 695 (2007/10/02)
Reactions of 3-arylidenechromanones (1-4) and -1-thiochromanones (5-8) with thiourea gave thiazines (9-16) under acidic and pyrimidine derivatives (17-21) under alkaline reaction conditions. Keywords.Benzopyranopyrimidines; Benzothiopyranopy
