SEARCH Articles Figures Tables 1,3-cycloaddition regioselective 1.3- dipolar cycloaddition reactions regioselective addition 1.3- dipolar cycloadditions regioselectivity 1.3- dipolar cycloadditions regioselectivity Cycloaddition regioselectivity Dipolar cycloaddition reactions regioselectivity Dipolar cycloaddition, regioselective Dipolar cycloaddition, regioselective Dipolar regioselectivity Nitrones, 1,3-dipolar cycloadditions, regioselectivity Regioselectivity nitrone 1,3-dipolar cycloadditions Regioselectivity of 1,3-dipolar cycloadditions