The CAS Registry Mumber 185424-91-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,5,4,2 and 4 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 185424-91: (8*1)+(7*8)+(6*5)+(5*4)+(4*2)+(3*4)+(2*9)+(1*1)=153 153 % 10 = 3 So 185424-91-3 is a valid CAS Registry Number.
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5-amino-1-(1,1-dimethylethyl)-4-(2,4-dimethyl-5-thiazolyl)-1,2-dihydro-