1,3-Dimethyl-2-[(1E,3E)-3-methyl-6-(2-methyl-[1,3]dioxolan-2-yl)-hexa-1,3-dienyl]-4-oxo-cyclohex-2-enecarboxylic acid methyl ester

4,8-dimethyl-5,5-(ethylenedioxy)-3-oxo-2-oxabicyclo<4.3.0>non-4(9)-ene

(7E,9E)-trisporic acid A