Synonyms: 7-Isorhyncophylline(8CI); Corynoxan-16-carboxylic acid, 16,17-didehydro-17-methoxy-2-oxo-, methylester, (16E,20a)-;Isorhyncophylline (6CI,7CI); Spiro[3H-indole-3,1'(5'H)-indolizine]-7'-aceticacid, 6'-ethyl-1,2,2',3',6',7',8',8'a-octahydro-a-(methoxymethylene)-2-oxo-, methyl ester, [1'S-[1'a,6'a,7'b(E),8'aa]]-