1346-36-7 4697-66-9 Indolo(2,3-a)quinolizine, corynan-16-carboxylic acid deriv Indolo(2,3-a)quinolizine-2-acetic acid, 3-ethenyl-1,2,3,4,6,7,12,12b-octahydro-8-methoxy-alpha-(methoxymethylene)-, methyl ester (alphaE,2S,3R,12bS)- Paynantheine