Arthrinic acid was isolated from solid state fermentations of the fungus Arthrinium phaeospermum. The structure of arthrinic acid was determined to be (6E,10E,14E,18E,20E)-2,3,5,9,13,17-hexahydroxy-20-(hydroxymethyl)-14,16,18,22,24-pentamethylhexacosa-6,10,14,18,20-pentaenoic acid from NMR spectroscopic studies.
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