109947-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109947-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,9,4 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109947-21:
(8*1)+(7*0)+(6*9)+(5*9)+(4*4)+(3*7)+(2*2)+(1*1)=149
149 % 10 = 9
So 109947-21-9 is a valid CAS Registry Number.
InChI:InChI=1/2C23H28N2O3.C4H4O4/c2*1-2-13-24-15-18(26)16-28-23-9-4-3-7-20(23)22(27)11-10-17-6-5-8-21-19(17)12-14-25-21;5-3(6)1-2-4(7)8/h2*3-9,12,14,18,24-26H,2,10-11,13,15-16H2,1H3;1-2H,(H,5,6)(H,7,8)/b;;2-1+