"Indole." . . . . . . . . . . . . . . . . . . "The fischer indole synthesis" . . . . . . . . . . . . "The Fischer indole synthesis" . "The Fischer indole synthesis"@en . . . "Indolderivate." . . . . "Composés organiques Synthèse." . . "Indole Synthèse." . . "Indol." . . "Indoles chemical synthesis." . . "Organische Synthese." . . "Organic compounds Synthesis." . .