Naphthyridine
(12S,13aS,13bS)-13a-Ethyl-2,3,5,6,12,13,13a,13b-octahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine-12-carboxylic acid methyl ester
(13aS,13bR)-2,3,5,6,12,13,13a,13b-octahydro-1H-indolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine
(5bR)-5,5bα,6,6aβ,10,11,16,16b,16cα,17,19,20-Dodecahydro-16bβ-methylbisindolo[2,3:3,4]pyrido[2,1-a:2,1-g][2,7]naphthyridine-7-carboxylic acid methyl ester
(7aS)-2,3,6,7,7aα,8,11,12,13,13aβ,13bα,13cα-Dodecahydro-1H,5H,10H-dipyrido[2,1-f:3,2,1-ij][1,6]naphthyridine
(7aS)-9-Ethyl-5,6,7,7aα,8,8aα,9,10-octahydro-12β-hydroxy-7-methylindolo[3,2,1-ij]pyrano[3,4-b][1,5]naphthyridine-12aα(12H)-carboxylic acid methyl ester
(7aS,9E)-9-Ethylidene-5,6,7,7aα,8,8aα,9,10-octahydro-12β-acetoxy-7-acetylindolo[3,2,1-ij]pyrano[3,4-b][1,5]naphthyridine-12aα(12H)-carboxylic acid methyl ester
(7aS,9E)-9-Ethylidene-5,6,7,7aα,8,8aα,9,10-octahydro-12β-hydroxyindolo[3,2,1-ij]pyrano[3,4-b][1,5]naphthyridine-12aα(12H)-carboxylic acid methyl ester
(7aS,9E)-9-Ethylidene-5,6,7,7aα,8,8aα,9,10-octahydro-12β-methoxy-7-methylindolo[3,2,1-ij]pyrano[3,4-b][1,5]naphthyridine-12aα(12H)-methanol