4-[2-(3,5-dimethyl-4-oxocyclohexa-2,5-dien-1-ylidene)ethylidene]-2,6-dimethylcyclohexa-2,5-dien-1-one

4-benzoyloxy-2,4,6-trimethyl-cyclohexa-2,5-dienone

5-butan-2-yl-2-hydroxybenzaldehyde

bromodimethoxymethane

2-methoxy-2-oxoacetate