433240-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 433240-57-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,3,2,4 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 433240-57:
(8*4)+(7*3)+(6*3)+(5*2)+(4*4)+(3*0)+(2*5)+(1*7)=114
114 % 10 = 4
So 433240-57-4 is a valid CAS Registry Number.
433240-57-4Relevant academic research and scientific papers
Modified coumarins. 6. Synthesis of substituted 5,6-benzopsoralens
Garazd,Ogorodniichuk,Garazd,Khilya
, p. 424 - 433 (2007/10/03)
Substituted 5H-benzo[c]furo[3,2-g]chromen-5-ones, modified analogs of psoralen that contain a benzene ring annelated at the 5,6-position of a furo[3,2-g]chromen-7-one system, were synthesized from 3-hydroxy-6H-benzo[c] chromen-6-ones.
