2-benzyl-6,11-dimethoxy-2,3,12,12a-tetrahydro-5H-2,4a-diazanaphthacene-1,4-dione

2-(4-chlorobenzyl)-7,12-dimethoxy-2,3,13,13a-tetrahydro-4H-benzo[g]pyrazino[1,2-b]isoquinoline-1,4(6H)-dione

6,11-dimethoxy-2-butyl-3,4,12,12a-tetrahydro-2H,5H-2,4a-diazanaphthacen-1-one

2-(4-chlorophenethyl)-7,12-dimethoxy-3,4,13,13a-tetrahydro-2H-benzo[g]pyrazino[1,2-b]isoquinolin-1(6H)-one