Five novel sesquiterpene glycosides, namely, cosmosporasides
AE (15), were isolated from the ethyl acetate extract of
the fermented broth of Cosmospora joca. The structures of 15 were
elucidated on the basis of spectroscopic data analyses, monosaccharide
composition analyses, and monosaccharide chirality analyses. The relative
configuration of the sesquiterpene moiety of 35 was determined by
J-based configuration analyses and supported by NOESY assignments.
The inhibitory effects of 15 on the nitric oxide (NO) production in
lipopolysaccharide (LPS)-activated murine macrophage RAW264.7 cells
were evaluated; all except 3 inhibited NO production at 100 μM. 4 was
the most potent, with an average maximum inhibition and a median inhibitory concentration value of 71.70 ( 1.23% and 65.98 (
0.53 μM, respectively.