title: Macrocyclic spermidine and spermine alkaloids.
mesh_terms: D000470:Alkaloids / Q000096:biosynthesis / Q000302:isolation & purification*; D055598:Chemical Phenomena; D002621:Chemistry; D003500:Cyclization; D007769:Lactams / Q000032:analysis; D008956:Models, Chemical; D010936:Plant Extracts / Q000032:analysis; D010946:Plants, Medicinal / Q000378:metabolism; D013095:Spermidine / Q000096:biosynthesis / Q000302:isolation & purification*; D013096:Spermine / Q000096:biosynthesis / Q000302:isolation & purification*
chemical_list: D000470:Alkaloids; D007769:Lactams; D010936:Plant Extracts; D013096:Spermine; D013095:Spermidine