Structure of onchidione, a bis-γ-pyrone polypropionate from a marine pulmonate mollusk
摘要:
The chemical investigation of the marine pulmonate Onchidium sp. and of its defensive mucous secretion led us to the isolation of a novel polypropionate, onchidione (4), containing two gamma-pyrone rings. The structure of 4 was elucidated by spectroscopic methods, mainly NMR techniques, and secured by X-ray analysis on a single crystal. (C) 2009 Elsevier Ltd. All rights reserved.
The isolation and structure elucidation of 10 unreported polypropionatemetabolites (compounds 6–15), structurally related to either ilikonapyrone (1) or onchidione (3), fromtwo onchidiid pulmonate mollusk species are discussed. Structure elucidation was achieved by NMR spectroscopy and chemical correlation with model compounds. Evaluation of in vitro growth-inhibitory properties in human cancer cells