SEARCH Articles Figures Tables Aldol reaction ester enolates Croton Crotonate Crotonates Crotonic Crotonic acid Crotonization Enol esters Enol esters reaction Enolates aldol reactions Enolates enol esters Enolic acids Enols acidity Enols aldol reactions Ester enolate Esters aldol reactions Esters enolates Esters enolization