[2-(4-Ethyl-4-hydroxy-3,13-dioxo-3,4,12,13-tetrahydro-1H-2-oxa-6,12a-diaza-dibenzo[b,h]fluoren-9-yloxy)-ethyl]-carbamic acid tert-butyl ester

[2-(4-Amino-3-[1,3]dioxolan-2-yl-phenoxy)-ethyl]-carbamic acid tert-butyl ester

(4-Ethyl-4-hydroxy-3,13-dioxo-3,4,12,13-tetrahydro-1H-2-oxa-6,12a-diaza-dibenzo[b,h]fluoren-9-yloxy)-acetic acid

5-<4-(1-cyclohexyl-1H-5-tetrazolyl)butoxy>-2-nitrobenzaldehyde

(4-Amino-3-[1,3]dioxolan-2-yl-phenoxy)-acetic acid ethyl ester