173774-91-9 NAPHTHACENO[2,1-G]ISOQUINOLINE-1,8,15(2H)- TRIONE,11-CHLORO-6,7,7A,15A-TETRAHYDRO-9,- 15A-DIHYDROXY-10,12,16-TRIMETHOXY-3,14- DIMETHYL- 500128-18-7 1,4-Methanopyridazino[1,2-b]phthalazine-6,11-dione,2-(6-chloro-3-pyridinyl)-1,2,3,4-tetrahydro-, (1R,2S,4R)-rel-