The CAS Registry Mumber 195253-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,5,2,5 and 3 respectively; the second part has 2 digits, 1 and 2 respectively. Calculate Digit Verification of CAS Registry Number 195253-12: (8*1)+(7*9)+(6*5)+(5*2)+(4*5)+(3*3)+(2*1)+(1*2)=144 144 % 10 = 4 So 195253-12-4 is a valid CAS Registry Number.
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N,N-diethyl-4-[3-[4-(phenylsulfonyl)phenyl]-1-isobenzofuranyl]-