81689-98-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81689-98-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,8 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81689-98:
(7*8)+(6*1)+(5*6)+(4*8)+(3*9)+(2*9)+(1*8)=177
177 % 10 = 7
So 81689-98-7 is a valid CAS Registry Number.
InChI:InChI=1/C36H42N4O4/c1-9-21-16(3)25-14-28-31(20(7)41)18(5)34(39-28)19(6)33-17(4)23(11-12-30(43)44-8)35(40-33)24-13-29(42)32-22(10-2)27(38-36(24)32)15-26(21)37-25/h14-15,17,20,23,37,39,41H,9-13H2,1-8H3/b25-14-,26-15-,27-15-,28-14-,33-19-,34-19-,35-24-/t17-,20?,23-/m0/s1