Antimicrobial Cuparene-Type Sesquiterpenes, Enokipodins C and D, from a Mycelial Culture of <i>Flammulina </i><i>v</i><i>elutipes</i>
作者:Noemia Kazue Ishikawa、Yukiharu Fukushi、Keiko Yamaji、Satoshi Tahara、Kunihide Takahashi
DOI:10.1021/np000593r
日期:2001.7.1
Two new cuparene-type sesquiterpenes, enokipodins C (1) and D (2), were isolated from culture medium of an edible mushroom, Flammulina velutipes, along with enokipodins A (3) and B (4). The structures of 1 and 2 were determined using spectroscopic methods (HRMS, H-1 and C-13, and 2D NMR). The absolute configuration of enokipodin C was determined from the observed IH NMR chemical shifts and NOEs in NOESY experiments after conversion into the corresponding esters with the chiral reagent 2-(2'-methoxy-1'-naphthyl)-3,4-dichlorobenzoic acid. All the metabolites showed antimicrobial activity against a fungus, Cladosporium herbarum, and Gram-positive bacteria, Bacillus subtilis and Staphylococcus aureus.