The CAS Registry Mumber 144318-23-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,4,3,1 and 8 respectively; the second part has 2 digits, 2 and 3 respectively. Calculate Digit Verification of CAS Registry Number 144318-23: (8*1)+(7*4)+(6*4)+(5*3)+(4*1)+(3*8)+(2*2)+(1*3)=110 110 % 10 = 0 So 144318-23-0 is a valid CAS Registry Number.
Convergent synthesis of (±)-dihydroisocodeine in 11 steps by the tandem radical cyclization strategy. A formal total synthesis of [±)-morphine
Parker,Fokas
, p. 9688 - 9689 (2007/10/02)
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