The CAS Registry Mumber 146803-45-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,6,8,0 and 3 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 146803-45: (8*1)+(7*4)+(6*6)+(5*8)+(4*0)+(3*3)+(2*4)+(1*5)=134 134 % 10 = 4 So 146803-45-4 is a valid CAS Registry Number.
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1,1-dimethylethyl ester, (3S)-