A new phenolic component from endophytic fungus of Euphorbia royleana Boss

The secondary metabolites of the endophytic fungus Aspergillus fumigatus derived from Euphorbia royleana was studied. Silica gel column chromatography, Sephadex LH-20 gel and liquid chromatography were used to separate and purify of Aspergillus fumigatus. The compounds were identified according to their physical and chemical properties and spectroscopic data. Three compounds ( 1 — 3 ) were isolated from the endophytic fungus A. fumigatus. Their structures were identified as methyl 4-(3,4-dihydroxyphenyl)-2-hydroxy-4-oxobutanoate ( 1 ), arctiin ( 2 ) and 3-hydroxy-4-methoxy-phenylethanol ( 3 ). Compound 1 is a new phenolic component named as methyl 4-(3,4-dihydroxyphenyl)-2-hydroxy-4-oxobutanoate ( 1 ).