191677-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191677-91-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,6,7 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 191677-91:
(8*1)+(7*9)+(6*1)+(5*6)+(4*7)+(3*7)+(2*9)+(1*1)=175
175 % 10 = 5
So 191677-91-5 is a valid CAS Registry Number.
191677-91-5Relevant academic research and scientific papers
Synthesis of new β-hydroxychalcones: Pongapinone A and ponganone II
Nakahira, Hiroyuki,Sunagawa, Makoto
, p. 4443 - 4446 (2007/10/03)
Practical synthesis of new hydroxychalcones, pongapinone A (1) and ponganone II (2), is described.
