Naphthoquinones produced by Fusarium oxysporum isolated from citrus

Six naphthoquinone pigments are described which were produced by Fusarium oxysporum isolates obtained from roots of diseased citrus trees. These were 8-O-methylbostrycoidin, 9-O-methylfusarubin, 9-O-methylanhydro-fusarubin, 5-O-methyljavanicin, 5-O-methylsolaniol and 1,4-naphthalenedione-3,8-dihydroxy-5,7-dimethoxy-2-(2-oxopropyl). These naphthoquinones had not been previously identified from F. oxysporum isolates.