The CAS Registry Mumber 107698-72-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,7,6,9 and 8 respectively; the second part has 2 digits, 7 and 2 respectively. Calculate Digit Verification of CAS Registry Number 107698-72: (8*1)+(7*0)+(6*7)+(5*6)+(4*9)+(3*8)+(2*7)+(1*2)=156 156 % 10 = 6 So 107698-72-6 is a valid CAS Registry Number.
Regioselective alkylation of guanine via diacyloxyglyoxal-N2-acetylguanine adduct to obtain 7-alkylguanine derivatives. Studies on alkylation of guanine I
Kjellberg,Johansson
, p. 625 - 627 (1986)
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