The CAS Registry Mumber 189261-26-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,2,6 and 1 respectively; the second part has 2 digits, 2 and 6 respectively. Calculate Digit Verification of CAS Registry Number 189261-26: (8*1)+(7*8)+(6*9)+(5*2)+(4*6)+(3*1)+(2*2)+(1*6)=165 165 % 10 = 5 So 189261-26-5 is a valid CAS Registry Number.
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N-(1-oxo-2-propylpentyl)-N-[(1-oxo-2-propylpentyl)oxy]-2-propyl-