SEARCH Articles Figures Tables 3- Membered rings reactivity 3- Membered rings three heteroatoms 4- Membered rings with three heteroatoms 5-Membered rings heteroatoms Heteroatomic Rings Heteroatoms, three-membered Of three-member rings Reactivity heteroatoms Reactivity of Rings Reactivity with Three heteroatoms Three-membered Three-membered rings Three-membered rings with two heteroatoms