The CAS Registry Mumber 172878-92-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,8,7 and 8 respectively; the second part has 2 digits, 9 and 2 respectively. Calculate Digit Verification of CAS Registry Number 172878-92: (8*1)+(7*7)+(6*2)+(5*8)+(4*7)+(3*8)+(2*9)+(1*2)=181 181 % 10 = 1 So 172878-92-1 is a valid CAS Registry Number.
Efficient Synthesis of 2'-Deoxyformycin A Containing Oligonucleotides and Characterization of Their Stability in Duplex DNA
Kuhn, Heiko,Smith, David P.,David, Sheila S.
, p. 7094 - 7095 (1995)
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