Monitoring the biosynthesis of secondary metabolites in agar-based fungal cultures in situ was performed using the droplet probe coupled with a Waters Acquity ultra-performance liquid chromatography (UPLC) system (Waters Corporation) to a Thermo QExactive Plus (Thermo Fisher Scientific) via procedures described previously [16 (link),26 (link)–29 ] and reviewed recently [16 (link)]. This technique probes the chemistry of the cultures via a mini-extraction of about 2 μL of 1:1 MeOH:H2O, permitting the mapping of secondary metabolites in live fungal cultures [26 (link)–28 (link),41 (link)].