Synonyms: 9a,17a-Etheno-1H-benzo[c]cyclopenta[h]phthalazino[2,3-a]cinnoline-11,16-dione, 8-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2,3,3a,4,5,5a,5b,6,7,8,9,17b-dodecahydro-3a,5b-dimethyl-3-[(1R,2E,4R)-1,4,5-trimethyl-2-hexen-1-yl]-, (3R,3aR,5aR,5bR,8S,9aS,17aS,17bR)-