Neue, lipophile Benzofuranderivate aus Ratanhiawurzel

Abstract

Two phenols have been isolated from the petroleum-ether extract of Ratanhiae radix Ph. Eur.; structure elucidation has been made by means of the following chemico-physical methods: UV, IR, (1)H-NMR, (13)C-NMR-spectroscopy and mass spectrometry, microhydrogenation and thermofractography. Structures are: 2-(p-methoxy-o-hydroxyphenyl) -5-propenyl (trans)-benzofurane; 2-(p-hydroxyphenyl)-3-methyl-5-propenyl-(trans)-benzofurane. Both compounds - newly discovered in Ratanhiae radix - proved to be effective UV-light filters. They could be useful in sun protection preparations.