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Xanthoquinodin A1 is a fungal metabolite that has been found in Humicola and has diverse biological activities.1,2 It inhibits E. tenella schizont formation in BHK-21 cells with a minimum effective concentration (MEC) value of 0.02 μg/ml.1 Xanthoquinodin A1 is active against B. subtilis, M. luteus, S. aureus, A. laidlawii, and B. fragilis in a disc assay when used at a concentration of 1 mg/ml. It is also active against B. cereus (MIC = 0.44 μM).2 Xanthoquinodin A1 is cytotoxic to KB, MCF-7, and NCI H187 cancer cells.

1.Tabata, N., Suzumura, Y., Tomoda, H., et al.Xanthoquinodins, new anticoccidial agents produced by Humicola sp. Production, isolation and physico-chemical and biological propertiesJ. Antibiot. (Tokyo)46(5)749-755(1993) 2.Tantapakul, C., Promgool, T., Kanokmedhakul, K., et al.Bioactive xanthoquinodins and epipolythiodioxopiperazines from Chaetomium globosum 7s-1, an endophytic fungus isolated from Rhapis cochinchinensis (Lour.) MartNat. Prod. Res.34(4)494-502(2020)

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