HPLC-UV profiles at 210 nm derived from barley-malt agar (A–C, E) and stromal (E) extracts and compound standard (F). UV/Vis spectra are shown for identified compounds in mono- and dual culture (C) experiments of STMA 18166 (Hym. fraxineus, A) and DSM 107933 (H. texense, B; UC 2, 4 – unknown compounds); stromal metabolites (4 – mitorubrinol; URg – unknown rubiginosin A derivative; 3 – rubiginosin A; 2 – mitorubrinol acetate; 7 – mitorubrin; UC2 – Unknown compound 2 of GLM-F116101 (H. texense, D), and ... ESI mass spectra of 8 in positive and negative modes... of 8 8 (rickiol A, F) identified in the mono culture extract of MUCL 54624 (H. rubiginosum, E).