The CAS Registry Mumber 91917-64-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,9,1 and 7 respectively; the second part has 2 digits, 6 and 4 respectively. Calculate Digit Verification of CAS Registry Number 91917-64: (7*9)+(6*1)+(5*9)+(4*1)+(3*7)+(2*6)+(1*4)=155 155 % 10 = 5 So 91917-64-5 is a valid CAS Registry Number.
Get Best Price for91917-64-5(2a,5-dimethoxy-6-methyl-4,7-dioxo-1,2,2a,3,4,7,7c,7d-octahydro-2,7b-diazabenzo[f]cyclopropa[cd]inden-3-yl)methyl carbamate