Figure 2: GC-MS analysis of chloroform extract of T. transcaucasicus flowers harvested 9 days after the labelling with 13CO2 for 4 hours. A. Gas chromatogram performed as described under Experimental. B. Corresponding mass spectrum and fragmentation pattern of thymol (molar mass 150.22 g/mol) from the labelled sample. C. Corresponding mass spectrum of unlabelled thymol from the NIST05s library.