The CAS Registry Mumber 319489-87-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,9,4,8 and 9 respectively; the second part has 2 digits, 8 and 7 respectively. Calculate Digit Verification of CAS Registry Number 319489-87: (8*3)+(7*1)+(6*9)+(5*4)+(4*8)+(3*9)+(2*8)+(1*7)=187 187 % 10 = 7 So 319489-87-7 is a valid CAS Registry Number.
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2,2'-[2-phenyl-1-(phenylmethyl)ethylidene]bis[4,5-dihydro-4-phenyl-,
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