2-hydroxy-1-((2’S,8S,10S,13S,14S,17R)-17-hydroxy-4′,10,13-trimethyl-6,7,8,10,12,13,14,15,16,17-decahydrospiro[cyclopenta[a]phenanthrene-3,2′-[1,3]dioxolan]-17-yl)ethanone