Résumé
Fusarubinoic acid, a new naphthoquinone pigment, was isolated from the culture medium of
Nectria haematococca (Berk. and Br.) Wr. The structure
1a, established on the basis of MS and
1H NMR determinations carried out on this compound and on the methyl ester
1b, was confirmed by a partial synthesis starting from anhydrofusarubin. fusarubinoic acid is a candidate precursor in the biosynthesis of fusarubin from the heptaketide
6, as of the corresponding anhydrofusarubin lactone
2.