81340-57-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81340-57-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,3,4 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 81340-57:
(7*8)+(6*1)+(5*3)+(4*4)+(3*0)+(2*5)+(1*7)=110
110 % 10 = 0
So 81340-57-0 is a valid CAS Registry Number.
InChI:InChI=1/C21H28O5.C14H22N2O/c1-19-7-5-13(23)9-12(19)3-4-14-15-6-8-21(26,17(25)11-22)20(15,2)10-16(24)18(14)19;1-5-16(6-2)10-13(17)15-14-11(3)8-7-9-12(14)4/h5,7,9,14-16,18,22,24,26H,3-4,6,8,10-11H2,1-2H3;7-9H,5-6,10H2,1-4H3,(H,15,17)/t14-,15-,16-,18+,19-,20-,21-;/m0./s1