SEARCH Articles Figures Tables Fused heterocycles systems Fused heterocyclic Fused heterocyclic systems Fused rings Fused systems Heterocycles fused Heterocycles oxidative cleavage Heterocyclic ring systems Heterocyclic systems Of heterocyclic rings Oxidation heterocyclic Oxidation systems Oxidative heterocyclization Oxidative systems Oxide ring Oxide systems Ring cleavage