3-Phenyl-propionic acid 2,11-dimethoxy-13-[3-methoxy-4-(3-phenyl-propionyloxy)-phenyl]-6-oxo-10-(3-phenyl-propionyloxy)-7,8-dihydro-6H-5-oxa-6b-aza-dibenzo[a,i]fluoren-3-yl ester

(4-Fluoro-phenylsulfanyl)-acetic acid 10-[2-(4-fluoro-phenylsulfanyl)-acetoxy]-13-{4-[2-(4-fluoro-phenylsulfanyl)-acetoxy]-3-methoxy-phenyl}-2,11-dimethoxy-6-oxo-7,8-dihydro-6H-5-oxa-6b-aza-dibenzo[a,i]fluoren-3-yl ester

2-tert-butoxycarbonylamino-3-methyl-butyric acid 10-(2-tert-butoxycarbonylamino-3-methyl-butyryloxy)-13-[4-(2-tert-butoxycarbonylamino-3-methyl-butyryloxy)-3-methoxy-phenyl]-2,11-dimethoxy-6-oxo-6H-5-oxa-6b-aza-dibenzo[a,i]fluoren-3-yl ester

6-tert-Butoxycarbonylamino-hexanoic acid 10-(6-tert-butoxycarbonylamino-hexanoyloxy)-13-[4-(6-tert-butoxycarbonylamino-hexanoyloxy)-3-methoxy-phenyl]-2,11-dimethoxy-6-oxo-6H-5-oxa-6b-aza-dibenzo[a,i]fluoren-3-yl ester

2-tert-butoxycarbonylamino-propionic acid 10-(2-tert-butoxycarbonylamino-propionyloxy)-13-[4-(2-tert-butoxycarbonylamino-propionyloxy)-3-methoxy-phenyl]-2,11-dimethoxy-6-oxo-7,8-dihydro-6H-5-oxa-6b-aza-dibenzo[a,i]fluoren-3-yl ester