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4H,10H-9a,13-Epoxy-15a,7-(epoxyethano)azepino[1,2-a]naphtho[2,1-g]quinoline-4,6,16,18-tetrone,1,4a,5,6a,7,7a,8,9,11,12,13,14,16a,16b-tetradecahydro-2,7,7a,11,16a-pentamethyl-,(4aS,6aR,7S,7aS,9aS,11S,13R,15aS,16aS,16bR)- (9CI)