Tetillapyrone and Nortetillapyrone, Two Unusual Hydroxypyran-2-Ones From the Marine Sponge Tetilla Japonica.

Abstract

Extraction of the marine sponge Tetilla japonica from the Bay of Thailand furnished tetillapyrone and nortetillapyrone, two unusual tetrahydrofurylhydroxypyran-2-ones, whose structures were established by NMR spectrometry and an X-ray analysis of tetillapyrone.