The phytochemical study of Mimulus glabratus A.Gray allowed the isolation of two cyclohexenones: the new compound 6-chlorohalleridone 1 and halleridone 2. Halleridone was also identified in Mimulus luteus L., together with dihydroalleridone 3, the naphtoquinone alpha-dunnione 4, ursolic acid and beta-sitosterol.
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