20-bromonauclefine

(+/-)-dihydronauclefine

2-[2-(1H-indol-3-yl)ethyl]-7H-2,7-naphthyridine-1,3-dione

14-(2,2,2-trifluoroacetyl)-8,13-dihydroindolo[2',3':3,4]pyrido[1,2-b][2,7]naphthyridin-5(7H)-one

5-溴烟酸