The cultured inoculums of A. niger were processed according
to the extraction procedures, shown in Supplementary
Fig. 1, to collect broth containing both extracellular (excreted
into the medium) and intracellular volatile compounds. Then,
225 mL of ethyl acetate were added into the inoculums cultured
in an Erlenmeyer flask, and the mixture was incubated
overnight to ensure that the fungal cells died. The mixtures
were then applied to UltraTurrax homogenizer for 10 min
(for cell destruction), followed by filtration using a Bu¨chner
vacuum separation funnel. The extracted mycelia (cell debris)
were thrown away, and the filtrate containing the ethyl acetate
phase was collected for further processing