1 Dipartimento di Chimica Organica e Industriale, Universita degli Studi di Milano, Via Venezian 21, 20133 Milano, Dipartimento di Scienza e Tecnologia del Farmaco, Universita degli Studi di Torino, Via Giuria 9, 10125 Torino, Italy, Institut f
Furohyperforin, an oxygenated analogue of the prenylated phloroglucinol hyperforin, was isolated from the aerial parts of Hypericum perforatum. Its structure was elucidated as 2 on the basis of extensive NMR investigations.