Fig. 2.

Gas chromatography–mass spectrometry (GC–MS) profile of biosynthetic sesquiterpenes. a Retention time and fragmentation pattern of biosynthetic epi-isozizaene (RT: 7.32 min) [17]. b Retention time and fragmentation pattern of produced pantalenene (RT: 6.56 min) [45]. c Retention time and fragmentation pattern of a broad spectrum of products from MrTPS2. The mixed products include silphinene (RT: 6.67 min), modeph-2-ene (RT: 6.90 min), α-isocomene (RT: 6.95 min), β-isocomene (RT: 7.15 min), caryophyllene (RT: 7.25 min), α-humulene (RT: 7.47 min) [20, 46]