Macrodasine A, a novel macroline derivative incorporating fused spirocyclic tetrahydrofuran rings containing a spiroacetal moiety

Macrodasine A, a novel macroline derivative incorporating fused spirocyclic tetrahydrofuran rings containing a spiroacetal moiety Macrodasines A–G, macroline indole alkaloids incorporating fused spirocyclic tetrahydrofuran–tetrahydrofuran and tetrahydrofuran–tetrahydropyran rings Unusual spirocyclic macroline alkaloids, nitrogenous derivatives, and a cytotoxic bisindole from Alstonia Unusual spirocyclic macroline alkaloids, nitrogenous derivatives, and a cytotoxic bisindole from Alstonia Novel Macroline Oxindoles from a Malayan Alstonia New Indole Alkaloids from <i>Alstonia macrophylla</i> New Indole Alkaloids from Alstonia macrophylla Macroxine-a novel oxindole alkaloid from Alstonia macrophylla Two New Indole Alkaloids fromAlstonia macrophylla Alstophyllin, ein neues Indolalkaloid aus Alstonia macrophylla W<scp>ALL</scp>