Secondary metabolites produced by an endophytic fungus Cordyceps ninchukispora from the seeds of Beilschmiedia erythrophloia Hayata

•Four new amides were isolated from Cordyceps ninchukispora BCRC 31900.•Thirteen known compounds were reported from this fungus for the first time.•The structures of the new compounds were determined by spectroscopic analysis.•Inhibitory effects of 10 compounds on NO production were evaluated.•Compound 3→4 reduced NO levels in LPS-stimulated RAW264.7 cells.