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Two undescribed  α -pyrone-containing polyketide derivatives designated aurovertins V ( 1 ) and W ( 2 ), and a known analogue ( 3 ), were isolated from the fungus  Aspergillus aureoterreus . Their structures including the absolute configuration were elucidated on the basis of extensive spectroscopic methods and theoretical ECD calculation. Compound  1  is the first example of aurovertins with a 7 R  configuration, whereas  2  comprises a  S  configuration for C-6 and a  Z  geometry of the double bond Δ 8 . Both  1  and  2  showed no cytotoxicity against human cancer cell lines HL-60, SU-DHL-2 and U266) at the concentration of 20.0 μM.

Two new α -pyrone-containing polyketides isolated from the fungus Aspergillus aureoterreus