The CAS Registry Mumber 77503-09-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,5,0 and 3 respectively; the second part has 2 digits, 0 and 9 respectively. Calculate Digit Verification of CAS Registry Number 77503-09: (7*7)+(6*7)+(5*5)+(4*0)+(3*3)+(2*0)+(1*9)=134 134 % 10 = 4 So 77503-09-4 is a valid CAS Registry Number.
Hard acid and soft nucleophile system. IV. Removal of benzyl protecting group with boron trifluoride etherate and dimethyl sulfide
Fuji,Kawabata,Fujita
, p. 3662 - 3664 (2007/10/02)
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