Figure 6: Two-dimensional HMBC spectra of crude leaves extracts of T. transcaucasicus. A. Leaves (1.7 g) of the 13CO2-labelled plant (4 hour pulse period) harvested after a chase period of 12 days. B. Leaves (1.7 g) of an unlabelled T. transcaucasicus plant (same developmental stage as the labelled plant). Both spectra were measured with the same standard parameter sets and 16 scans per increment.