Two new chromones, spororrminone A (, ()-5-hydroxy-2-methyl-4-oxo-2-(()-5-oxotetrahydrofuran-2-yl)chroman-7-carboxylic acid) and 2--spororrminone A (, ()-5-hydroxy-2-methyl-4-oxo-2-(()-5-oxotetrahydrofuran-2-yl)chroman-7-carboxylic acid), were isolated from an EtOAc extract of an endolichenic fungal strain (No. 71-11-4-1). The structures of these compounds were identified by spectroscopic analyses. The absolute configuration of was established by single-crystal X-ray diffraction. Spororrminone A () and 2--spororrminone A () represent the first examples of 2-(5-oxotetrahydrofuran-2-yl) chromones with 7-carboxylic group.
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| http://dx.doi.org/10.1080/14786419.2019.1610758 | DOI Listing |
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