1) beta-gamma unsaturation β-γ不饱和2) β,γ-unsaturated ketones β,γ-不饱和酮3) β,γ-unsaturated carboxylic acid β,γ-不饱和羧酸4) α,β-unsaturated-γ-keto-lactone α,β-不饱和-γ-缩酮内酯5) γ-oxo-α,β-unsaturated esters γ-氧代-α,β-不饱和酯 1. The dissertation ...