Fistupyrone, a novel inhibitor of the infection of Chinese cabbage by Alternaria brassicicola, from Streptomyces sp. TP-A0569.

A new microbial metabolite, designated fistupyrone, was isolated from the culture broth of a plant-associated Streptomyces sp. TP-A0569. Fistupyrone inhibited the in vivo infection of the seedlings of Chinese cabbage by Alternaria brassicicola TP-F0423, the cause of Alternaria leaf spot, without any in vitro fungicidal activity.