“…On the basis of detailed spectroscopic analysis and by comparison with reported data, four known hydroxyanthraquinone analogues ( 1 , 2 , 3 , 4 ) were readily determined as 1‐hydroxy‐3‐methyl‐9,10‐anthraquinone (pachybasin, 1 ), 1,7‐dihydroxy‐3‐methyl‐9,10‐anthraquinone ( 2 ), 1,6‐dihydroxy‐3‐methyl‐9,10‐anthraquinone (phomarin, 3 ), and 1‐hydroxy‐3‐hydroxymethyl‐9,10‐anthraquinone ( 4 ) . The major metabolite pachybasin ( 1 ) was purified from the fungus Trichoderma harzianum ETS 323 with much higher yield and is mainly used as a yellow pigment.…”