Pyrrolo[1,2-a]
(-)-3-(5-Formyl-2-hydroxyphenyloxy)-4-methoxybenzoic acid (5aS,6S)-1,2,3,4,5a,6-hexahydro-2-methyl-1,4-dioxo-3-thioxooxepino[3,4:4,5]pyrrolo[1,2-a]pyrazine-6-yl ester
(1-benzoyl-6,8a-dimethoxy-5-methyl-4,7-dioxo-1,1a,2,4,7,8,8a,8b-octahydroazireno[2',3':3,4]pyrrolo[1,2-a]indol-8-yl)methyl carbamate
(1AS,4S,6AR,7AS)-6-AMINO-1,1A,4,6A,7,7A-HEXAHYDRO-4-(3-HYDROXYTRICYCLO[3.3.1.13,7]DEC-1-YL)-3H-CYCLOPROPA[4,5]PYRROLO[1,2-A]PYRAZIN-3-ONE
(1aS,8aR,8bS)-6,8a-dimethoxy-1,5-dimethyl-8-methylidene-1,1a,2,8,8a,8b-hexahydroazireno[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione
(1aS,8R,8aR,8bS)-6-Amino-8-[[(aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-8a-methoxy-1,5-dimethylazirino[2,3:3,4]pyrrolo[1,2-a]indole-4,7-dione
(1aS,8R,8aR,8bS)-8-[[(Aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-6,8a-dimethoxy-1,5-dimethylazirino[2,3:3,4]pyrrolo[1,2-a]indole-4,7-dione