Structure and absolute configuration of acetosellin, a new polyketide from a phytotoxic strain of Cercosporella acetosella
摘要:
A new yellow pigment, designated acetosellin 1, was isolated from the mycelium of Cercosporella acetosella as a reduced azaphilone metabolite. The structure of I was determined by spectroscopic investigations and chemical evidence. Compound I possesses a novel carbon skeleton that of a naphtopyrane derivative, linked to an extensively conjugated chain. The absolute configuration was determined by NOE experiments and CD correlations. (C) 2002 Elsevier Science Ltd. All rights reserved.
Structure and absolute configuration of acetosellin, a new polyketide from a phytotoxic strain of Cercosporella acetosella
摘要:
A new yellow pigment, designated acetosellin 1, was isolated from the mycelium of Cercosporella acetosella as a reduced azaphilone metabolite. The structure of I was determined by spectroscopic investigations and chemical evidence. Compound I possesses a novel carbon skeleton that of a naphtopyrane derivative, linked to an extensively conjugated chain. The absolute configuration was determined by NOE experiments and CD correlations. (C) 2002 Elsevier Science Ltd. All rights reserved.