(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

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

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

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

anti-1,6-dimethyl-3,4-benzo-7,9-dioxabicyclo(4.2.1)nonene-2,5-dione-8-spiro-r-1-t-2',t-3'-epoxy-c-2',c-3'-dimethyl-1',2',3',4',-tetrahydronaphthalen-4-one