249640-51-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 249640-51-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,9,6,4 and 0 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 249640-51:
(8*2)+(7*4)+(6*9)+(5*6)+(4*4)+(3*0)+(2*5)+(1*1)=155
155 % 10 = 5
So 249640-51-5 is a valid CAS Registry Number.
249640-51-5Relevant articles and documents
Synthesis of 5,7,4'-trihydroxy-6-C-prenylflavone
Hossain, M. Amzad
, p. 590 - 592 (2007/10/03)
5,7,4'-Trihydroxy-6-C-prenylflavone 6 isolated from the fruits of Maclura pomifera has been synthesized by the following route. Phloroacetophenone 1 on treatment with methoxymethyl chloride afford 2- hydroxy-4,6-di(methoxymethoxy) acetophenone 2 which on