4-(((3R,5S,8R,9S,10S,13R,14S,17R)-17-((E)-3-methoxy-3-oxoprop-1-en-1-yl)-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-3-yl)oxy)-4-oxobutanoic acid

4-(((3R,5S,8R,9S,10S,13R,14S,17R)-17-((E)-3-ethoxy-3-oxoprop-1-en-1-yl)-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-3-yl)oxy)-4-oxobutanoic acid