Integracide derivatives produced by endophyte Fusarium armeniacum M-3 isolated from Digitaria ciliaris

Nat Prod Res. 2023 Jan 11:1-8. doi: 10.1080/14786419.2022.2164580. Online ahead of print.

Abstract

Two new integracides, dedimethyl integracide B (1) and integracide K (2), were isolated from rice cultures of Fusarium armeniacum M-3, an endophyte isolated from Digitaria ciliaris, together with the known terpenoids, integracide B (3) and 2-deoxy-integracide B (4). Assignment of the signals in the 1H and 13C NMR spectra of 1 and 2 was achieved using DEPT, HMQC, HMBC, and NOESY spectra. Compound 2 exhibited moderate cytotoxicity against HeLa cells.

Keywords: Cytotoxicity; Digitaria ciliaris; Fusarium armeniacum; endophyte; integracides.