128988-57-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128988-57-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,8 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 128988-57:
(8*1)+(7*2)+(6*8)+(5*9)+(4*8)+(3*8)+(2*5)+(1*7)=188
188 % 10 = 8
So 128988-57-8 is a valid CAS Registry Number.
InChI:InChI=1/C33H40O21/c1-9-19(39)23(43)26(46)31(48-9)54-30-25(45)21(41)17(8-35)52-33(30)53-29-22(42)18-14(38)5-11(49-32-27(47)24(44)20(40)16(7-34)51-32)6-15(18)50-28(29)10-2-3-12(36)13(37)4-10/h2-6,9,16-17,19-21,23-27,30-41,43-47H,7-8H2,1H3/t9-,16+,17+,19-,20+,21-,23+,24-,25-,26+,27+,30+,31-,32+,33-/m0/s1