97998-55-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 97998-55-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,9,9 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 97998-55:
(7*9)+(6*7)+(5*9)+(4*9)+(3*8)+(2*5)+(1*5)=225
225 % 10 = 5
So 97998-55-5 is a valid CAS Registry Number.
InChI:InChI=1/C40H48O4/c1-21(2)25-9-29-17-31-11-26(22(3)4)13-33(38(31)42)19-35-15-28(24(7)8)16-36(40(35)44)20-34-14-27(23(5)6)12-32(39(34)43)18-30(10-25)37(29)41/h9-16,21-24,41-44H,17-20H2,1-8H3
97998-55-5Relevant academic research and scientific papers
Zheng, Yan-Song,Huang, Zhi-Tang
, p. 1237 - 1245 (1997)
Calix[n]arenes 1-3 (n = 4, 6 and 8) were alkylated with alkyl chlorides in the presence of anhydrous aluminium chloride in chloroform by Friedel-Crafts reaction to give p-alkylcalix[n]arens 5-7 (n = 4, 6 and 8) in good to excellent yields.