Two new cyclohexenone derivatives, 4β,5α-dihydroxy-2,5β-dimethylcyclohex-2-enone (1) and its isomer, 4α,5α-dihydroxy-2,5β-dimethylcyclohex-2-enone (2), were isolated from a novel actinobacterium, Enteractinococcus coprophilus, obtained from Panthera tigris amoyensis feces. Their structures were elucidated on the basis of 1D and 2D NMR as well as MS, IR, and UV spectroscopic data analysis.
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