SEARCH Articles Figures Tables 4- Membered rings with three heteroatoms 5-Membered rings heteroatoms APPLICATIONS OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS Eight-membered Rings containing Three or More Heteroatoms Heteroatomic Rings Heteroatoms, three-membered Heteroatoms, three-membered ring opening with REACTIVITY OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS STRUCTURE OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS SYNTHESIS OF THREE-MEMBERED RINGS WITH TWO HETEROATOMS Seven-membered Rings containing Three or More Heteroatoms Seven-membered rings three heteroatoms Six-Membered Rings with Three Heteroatoms Three heteroatoms Three-Membered Rings with One Heteroatom Three-membered Three-membered rings Three-membered rings with two heteroatoms