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
Diindolo[2',3':3,4]pyrido[2,1-a:2',1'-g][2,7]naphthyridine-7-carboxylicacid, 5,5b,6,6a,10,11,16,16b,16c,17,19,20-dodecahydro-16b-methyl-, methyl ester