Synonyms: Methyl (16E)-16-(methoxymethylene)-2-oxocorynoxan-17-oate;Corynoxine(6CI,8CI);Spiro[3H-indole-3,1'(5'H)-indolizine]-7'-acetic acid,6'-ethyl-1,2,2',3',6',7',8',8'α-octahydro-α-(methoxymethylene)-2-oxo-, methyl ester, [1'S-[1'a,6'b,7'b(E),8'aa]]-;Spiro[3H-indole-3,1'(5'H)-indolizine]-7'-aceticacid, 6'-ethyl-1,2,2',3',6',7',8',8'a-octahydro-α-(methoxymethylene)-2-oxo-, methyl ester, (αE,1'S,6'S,7'S,8'αS)-;