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Check Digit Verification of cas no

The CAS Registry Mumber 88899-59-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,8,8,9 and 9 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 88899-59:
(7*8)+(6*8)+(5*8)+(4*9)+(3*9)+(2*5)+(1*9)=226
226 % 10 = 6
So 88899-59-6 is a valid CAS Registry Number.
InChI:InChI=1/C19H25NO4/c1-12-6-7-13-4-2-3-5-14(13)18(12)17-10-16(20-8-9-21)15(11-22)19(23)24-17/h6-7,10-14,18,20-21H,2-5,8-9H2,1H3/t12-,13+,14+,18+/m0/s1

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