| antileishmanial metabolites from geosmithia langdonii. | antileishmanial bioassay guided fractionation of geosmithia langdonii has resulted in the isolation and identification of two new compounds (1 and 2) together with 10 known compounds (3-12). the structures of the isolated metabolites were elucidated based on comprehensive 1d and 2d nmr spectroscopic data as well as mass spectrometry. the absolute configuration at c4, c5, and c6 of 2 was determined as r using a modified mosher esterification method and noesy correlations. the extracts and the iso ... | 2014 | 25084548 |