Fa. Macias et al., (+)-Brevione A. The first member of a novel family of bioactive spiroditerpenoids isolated from Penicillium brevicompactum Dierckx, TETRAHEDR L, 41(15), 2000, pp. 2683-2686
(+)-Brevione A, the first member of a novel family of bioactive spiroditerp
enoids, a potential allelopathic agent, has been isolated from the ethyl ac
etate active fractions of the aqueous acetone extracts of semi-solid fermen
ted Penicillium brevicompactum Dierckx. The structure displays the novel sp
iroditerpenoid skeleton of breviane. The structure elucidation of brevione
A was performed by homo- and hetero-nuclear 2D NMR spectral data. On the ba
sis of combined studies of the theoretical conformations and NOEDIFF data,
its relative stereochemistry is proposed. (C) 2000 Elsevier Science Ltd. Al
l rights reserved.