(+)-8-(3-Methylureido)-4-oxo-5,10-dihydro-4H-imidazo[1,2-a]indeno[1,2-e]pyrazine-10-acetic acid
(+)-8-(3-Methylureido)-4-oxo-5,10-dihydro-4H-imidazo[1,2-a]indeno[1,2-e]pyrazine-10-acetic acid
(12aR,12bR)-tetrahydrodipyrazino[1,2-a:2',1'-c]pyrazine-1,3,10,12(2H,4H,9H,11H)-tetrone
(12ar,12bs)-4,6,7,9,12a,12b-hexahydrodipyrazino[1,5-d:1',5'-f]pyrazine-1,3,10,12-tetrone
(12AS,12BS)-6,7,12A,12B-TETRAHYDRODIPYRIDO[1,2-A:2',1'-C]PYRAZINE
(2-ALPHA-,4A-ALPHA-,7-BÉTA-,8A-BÉTA-)-DECAHYDRO-2,7-DIMETHYL-PYRAZINO[2,3-B]PYRAZINE
(2R,10AS)-2,7-DIMETHYL-2,3,10,10A-TETRAHYDRO-1H,5H-DIPYRROLO[1,2-A:1',2'-D]PYRAZINE