15-((7R,8R,9S,13S,14S,17S)-17-methoxy-3-(methoxymethoxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)-1-phenyl-2,5,8,11-tetraoxapentadecane

tert-butyl 16-((7R,8R,9S,13S,14S,17S)-17-methoxy-3-(methoxymethoxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-7-yl)-3,6,9,12-tetraoxahexadecan-1-oate