SEARCH Articles Figures Tables 3-Keto esters Addition keto esters Additives esters Enol esters Enol esters reaction Enolate Additions Enolates addition reactions Enolates enol esters Enolization keto-enol Enols addition reactions Ester enolate Ester enolates addition reactions Esters addition reactions Esters enolates Esters enolization Keto-enolates Keto-enols Y-Keto esters Y-keto