Abstract Gloeosporone, the germination self-inhibitor from the fungus Colletotrichum gloeosporioides f. sp. jussiaea, is shown by spectroscopic data and X-ray analysis to have the constitution and relative configuration as shown in Formula2 (either (1S, 6R, 12R)-1- hydroxy-6-pentyl-5, 15-dioxabicyclo [10.2. 1] pentadecan-4, 13-dione or its enantiomer), rather than the previously assigned constitution 1.
