title: [Studies on indole derivatives. XXI. Reactions of 3-(methylthio)thiapyrano-(3,4-b)indol-1-ones and 4-(methylthio)pyrano(3,2-b)indol-2-ones with active methylenes (author's transl)].
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D007211:Indoles; D008745:Methylation; D009570:Nitriles
chemical_list: D007211:Indoles; D009570:Nitriles