205518-87-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 205518-87-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,5,1 and 8 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 205518-87:
(8*2)+(7*0)+(6*5)+(5*5)+(4*1)+(3*8)+(2*8)+(1*7)=122
122 % 10 = 2
So 205518-87-2 is a valid CAS Registry Number.
205518-87-2Relevant articles and documents
Synthesis of 5,6,7,8-tetrahydro-2H-1-benzopyran-2,5-diones and 1,5-dihydro-2H-pyrrol-2-ones
Mu?i?, Irena,Golobi?, Amalija,Ver?ek, Bojan
, p. 353 - 358 (2007/10/03)
The use of 2-benzoylamino-3-chloropropenoic acid in the synthesis of 5,6,7,8-tetrahydro-2H-1-benzopyran-2,5-diones and 1,5-dihydro-2H-pyrrol-2-ones is reported.