(E)-1-(2-acetyl)ethylidenephthalide

3-(3-oxobutan-2-ylidene)-2-benzofuran-1-one

2-acetyl-2-methyl-1,3-indandione

(E)-r-1-acetoxy-c-2,c-3-dimethyl-t-2,t-3-epoxy-(2-phthalidenyl)ethyl-1,2,3,4-tetrahydronaphthalen-4-one

(Z)-r-1-acetoxy-c-2,c-3-dimethyl-t-2,t-3-epoxy-1-(2-phthalidenyl)ethyl-1,2,3,4-tetrahydronaphthalen-4-one