72017-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72017-91-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,0,1 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 72017-91:
(7*7)+(6*2)+(5*0)+(4*1)+(3*7)+(2*9)+(1*1)=105
105 % 10 = 5
So 72017-91-5 is a valid CAS Registry Number.
InChI:InChI=1/C33H26N8O15S4.4Na/c1-56-25-12-19(6-7-24(25)39-41-31-27(60(53,54)55)11-16-9-21(58(47,48)49)14-23(35)29(16)33(31)43)38-36-17-2-4-18(5-3-17)37-40-30-26(59(50,51)52)10-15-8-20(57(44,45)46)13-22(34)28(15)32(30)42;;;;/h2-14,37,39H,34-35H2,1H3,(H,44,45,46)(H,47,48,49)(H,50,51,52)(H,53,54,55);;;;/q;4*+1/p-4/b38-36+,40-30+,41-31-;;;;