Abstract:
The search for novel bioactive fungal secondary metabolites is the research
subject of this M.Sc. thesis. Two research targets (fungi), Phomposis sp Sher7 and
Phomposis sp Cgre2, isolated from Stephania hernandifolia and Casearia
grewiaefolia, respectively, were selected, based on the bioactivity data from a
preliminary study. Chemical investigation of the endophytic fungus, Phomposis sp
Sher7, resulted in the isolation and structural determination of two new compounds,
(E)-((E)-9,10-hydroxy-5-(1-oxo-tetrahydro-furan-2-yl)-hexa-7-en-yl)-3′-methyl-but-
2′-enoic acid (compound 1) and (E)-((E)-9,10-dihydroxy-6-(1-oxo-3,4-dihydrofuran-
3-yl)hex-7-enyl)-3′-methyl-but-3′-enolate (compound 2). An investigation of
bioactive compounds from a fungal culture of Phomposis sp Cgre2 led to the isolation
of compound 3. The chemical structures of these isolated compounds were
established on the basis of their spectroscopic data.