[2-[(8S,9S,10R,13S,14S,17S)-10,13-dimethylspiro[1,2,4,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthrene-3,2'-1,3-dioxolane]-17-yl]-2-oxoethyl] acetate

2,2-二甲氧基丁烷

(8A'r)-8A'-甲基-3',4',8',8A'-四氢-2'H-螺[1,3-二氧戊环-2,1'-萘]-6'(7'H)-酮

2,6-dimethyl-9-(2-methyl-1,3-dioxolan-2-yl)non-6-en-3-one

2-methyl-5-(2-methyl-1,3-dioxolan-2-yl)pent-2-enal