4-methyl-9',10'-dihydrospiro[cyclopentane-1,11'-[9,10]ethanoanthracen]-3-en-2-one

methyl 11-(2-methylbut-2-en-1-yl)-9,10-dihydro-9,10-ethanoanthracene-11-carboxylate

4-(diethoxyphosphoryl)-5-oxoheptan-2-yl acetate

5-methyl-2-(1-pyrrolidinyl)-2-cyclopenten-1-one

甲基环戊烯醇酮