Spectroscopic Characterization of a Pyridine Alkaloid from an Endophytic Strain of the Fusarium incarnatum-equiseti Species Complex

Chemical investigation of the endophytic strain A1021B ascribed to the Fusarium incarnatum-equiseti species complex led to the isolation of a novel pyridine alkaloid related to fusaric acid. The structure was elucidated by 1D and 2D NMR experiments (1H, 13C, COSY, HSQC, CIGAR-HMBC, H2BC). The compound induced cytotoxic effects on six human cancer cell lines (SK-N-BE(2)-C, SH-SY5Y, A549, HepG2, HeLa, and MCF-7).