Macrocyclic enol-ethers containing an acetylenic group from the red alga Phacelocarpus labillardieri

Abstract

Four new acetate-derived metabolites have been isolated from two collections of the red alga Phacelocarpus labillardieri. Three of these metabolites were 2,6-disubstituted pyran-4-ones containing a macrocyclic enol-ether ring. The fourth compound was a 6-substituted pyran-2-one derivative.