Sclerotia are known to be fungal survival structures, and induction of sclerotia may prompt production of otherwise undiscovered
metabolites. Aspergillus sclerotiicarbonarius (IBT 28362) was investigated under sclerotium producing conditions, which
revealed a highly altered metabolic profile. Four new compounds were isolated from cultivation under sclerotium formation
conditions and their structures elucidated using different analytical techniques (HRMS, UV, 1D and 2D NMR). This included
sclerolizine, an alkylated and oxidized pyrrolizine, the new emindole analog emindole SC and two new carbonarins; carbonarins I
and J. We have identified the three latter as true sclerotial metabolites. All metabolites were tested for antifungal and
antiinsectan activity, and sclerolizine and carbonarin I displayed antifungal activity against Candida albicans, while all four
showed antiinsectan activity. These results demonstrate induction of sclerotia as an alternative way of triggering otherwise silent
biosynthetic pathways in filamentous fungi for the discovery of novel bioactive secondary metabolites