phosphoric acid 4-[2-(2-benzyloxy-propyl)-[1,3]dioxolan-2-ylmethyl]-5,7-dihydroxy-9-methoxymethoxy-8-methyl-6,11-dioxo-6,11-dihydro-naphthacen-2-yl ester diethyl ester
10-[2-(2-benzyloxy-propyl)-[1,3]dioxolan-2-ylmethyl]-1,8,11-trihydroxy-3-methoxymethoxy-2-methyl-naphthacene-5,12-dione
phosphoric acid 4-[2-(2-benzyloxy-propyl)-[1,3]dioxolan-2-ylmethyl]-5-oxo-1,4,4a,5,8,8a-hexahydro-naphthalen-2-yl ester diethyl ester
phosphoric acid 4-(4-benzyloxy-2-oxo-pentyl)-5-oxo-1,4,4a,5,8,8a-hexahydro-naphthalen-2-yl ester diethyl ester
benzoic acid 2-[3-(diethoxy-phosphoryloxy)-8-oxo-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl]-ethyl ester