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A phytotoxic macrolide and a hexaketide, putaminoxins B and C, respectively, were isolated together with putaminoxin, the main phytotoxin, from liquid culture filtrates of Phoma putaminum, the causal agent of leaf necrosis of Erigeron annuus, a common weed of fields and pastures. Putaminoxins B and C were characterized, using spectroscopic methods, as a new disubstituted nonenolide and a new disubstituted...
Phoma putaminum, the causal agent of leaf necrosis of Erigeron annuus, a common weed of field and pasture, produced toxic metabolites when grown in liquid culture. The main phytotoxin, named putaminoxin, was isolated and characterized using spectroscopic and chemical methods as (5S)5-hydroxy-9-propyl-6-nonen-9-olide, a new 10-macrolide. When assayed on leaves of host and non-host plants, putaminoxin...
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