SEARCH Articles Figures Tables 3.4- fused indole skeleton synthesis Cyclopentene-fused indole Diazepine, indole-fused Diels-Alder cycloaddition fused indoles Fused indoles Fused-Ring Five-Membered Heterocycles Indoles and Purines Fused-Ring Indole Alkaloids Indole-fused diazepines Indole-fused products Indole-fused pyran-4-ones Tetracyclic-fused indole