557791-38-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 557791-38-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,7,9 and 1 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 557791-38:
(8*5)+(7*5)+(6*7)+(5*7)+(4*9)+(3*1)+(2*3)+(1*8)=205
205 % 10 = 5
So 557791-38-5 is a valid CAS Registry Number.
557791-38-5Relevant articles and documents
2,6-Diamino-5,8-diaza-7,9-dicarba-purine
Wang, Zhijun,Huynh, Hoan K.,Han, Bo,Krishnamurthy, Ramanarayanan,Eschenmoser, Albert
, p. 2067 - 2070 (2003)
(Matrix presented) The title compound, a constitutional isomer of the natural nucleobase 2,6-diaminopurine, undergoes regioselective electrophilic substitutions at carbon C-9.