The CAS Registry Mumber 144318-30-9 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, 3 and 0 respectively. Calculate Digit Verification of CAS Registry Number 144318-30: (8*1)+(7*4)+(6*4)+(5*3)+(4*1)+(3*8)+(2*3)+(1*0)=109 109 % 10 = 9 So 144318-30-9 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 (1992)
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