9-Hydroxyoudemansin A is an antibiotic produced by Mycena sp. HKI 0153. It has antifungal activity, lower than Oudemansin (Oudemansin), has an MIC of 12.5 μg/mL against ochre-like yeast, and is resistant to fungi such as Candida albicans, Crimson Yeast, Penicillium and Streptomyces with MICs are all> 50 μg/mL. No anti-bacterial effect.