87894-71-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87894-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,8,9 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 87894-71:
(7*8)+(6*7)+(5*8)+(4*9)+(3*4)+(2*7)+(1*1)=201
201 % 10 = 1
So 87894-71-1 is a valid CAS Registry Number.
87894-71-1Relevant articles and documents
Some Reactions of 2H-Benzothienopyran-2-ones and Related Compounds
Guggle, Katherine,Ghogain, Una Ni,MacManus, Patrick
, p. 945 - 952 (2007/10/02)
The conversion of 2H-benzothienopyran-2-ones into mono- and dithio-derivatives and the preparation of some dibenzothiophenes, sulphines and pyridones are described. - Keywords: Benzothienopyranones; Thiopyranobenzothiophenones