18921-65-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18921-65-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,9,2 and 1 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 18921-65:
(7*1)+(6*8)+(5*9)+(4*2)+(3*1)+(2*6)+(1*5)=128
128 % 10 = 8
So 18921-65-8 is a valid CAS Registry Number.
InChI:InChI=1/C20H20N6O5/c21-17-13-7-10(1-6-14(13)25-20(22)26-17)9-23-12-4-2-11(3-5-12)18(29)24-15(19(30)31)8-16(27)28/h1-7,15,23H,8-9H2,(H,24,29)(H,27,28)(H,30,31)(H4,21,22,25,26)