1H-​Dibenz[e,​g]​indole-​1-​heptanoic acid, 9-​fluoro-​2,​3-​dihydro-​β,​δ-​dihydroxy-​3-​(1-​methylethyl)​-​2-​oxo-​3-​[(phenylamino)​carbonyl]​-​, calcium salt (2:1)​, [3R-​[1(βR*,​δR*)​,​3R*]​]​- (9CI)