Patent ID: 8686178

Claim:
A derivative of 18Î²-glycyrrhetinic acid being selected from a group consisting of structure I and structure II: wherein residue R 1 is CH 3 and residue R 2 is COOCH(CH 3 ) 2 or CONHCH 2 (CH 3 ) 2 , or residue R 1 is CH 2 C 6 H 5 and residue R 2 is COOCH 2 CH 3 , COOCH(CH 3 ) 2 , CONHCH 2 CH 3 , CONHCH 2 CH 2 CH 3 or CONHCH 2 (CH 3 ) 2 ; wherein residue R 3 is selected from one of COOCH 2 CH 3 , COOCH(CH 3 ) 2 , CONHCH 2 CH 3 , CONHCH 2 CH 2 CH 3 and CONHCH 2 (CH 3 ) 2 .