137681-56-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137681-56-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,6,8 and 1 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 137681-56:
(8*1)+(7*3)+(6*7)+(5*6)+(4*8)+(3*1)+(2*5)+(1*6)=152
152 % 10 = 2
So 137681-56-2 is a valid CAS Registry Number.
InChI:InChI=1/C40H50O14/c1-25(15-12-20-28-16-6-4-7-17-28)14-10-11-22-31(42)52-33-32(43)38(53-34(35(44)45)39(50,36(46)47)40(33,54-38)37(48)49)23-13-21-30(51-27(3)41)26(2)24-29-18-8-5-9-19-29/h4-10,14,16-19,25-26,30,32-34,43,50H,11-13,15,20-24H2,1-3H3,(H,44,45)(H,46,47)(H,48,49)/b14-10+/t25-,26?,30?,32+,33+,34+,38-,39+,40-/m0/s1