SEARCH Articles Figures Tables 1,3-cycloaddition intramolecular Intramolecular cycloadditions nitrones/nitronates Intramolecular cycloadditions structure Nitronate structures Nitronates cycloadditions Nitronates intramolecular Nitronates intramolecular cycloadditions Nitronates structure Nitrone cycloaddition intramolecular Nitrones cycloaddition Nitrones intramolecular cycloaddition Nitrones intramolecular cycloadditions Nitrones, cycloadditions