Synonyms: Corynoxan-16-carboxylicacid, 16,17-didehydro-17-methoxy-2-oxo-, methyl ester, (7b,16E,20a)-;Rhyncophylline (6CI,7CI,8CI);Mitrinermine;NSC 21731;Rhynchophyllin;Spiro[3H-indole-3,1'(5'H)-indolizine]-7'-acetic acid, 6'-ethyl-1,2,2',3',6',7',8',8'a-octahydro-a-(methoxymethylene)-2-oxo-,methyl ester, [1'R-[1'a,6'b,7'a(E),8'ab]]-;18.beta.-Glycyrrhetic acid;Mitrinermin;