Isocorynoxeine

(16E,20α)-16,17,18,19-Tetradehydro-17-methoxy-2-oxocorynoxan-16-carboxylic acid methyl ester

(alphaE,1'S,6'R,7'S,8'aS)-6'-ethenyl-1,2,2',3',6',7',8',8'a-octahydro-alpha-(methoxymethylene)-2-oxospiro[3H-indole-3,1'(5'H)-indolizine]-7'-acetic acid methyl ester