Aroma-active Compounds of Elatostema laetevirens and Elatostema umbellatum var. majus

The essential oils from aerial parts of Elatostema laetevirens and Elatostema umbellatum var. majus were investigated by capillary GC and GC-MS. The important aroma-active compounds were also detected in the oil using GC-MS/O and aroma extraction dilution analysis (AEDA). As a result, 79 compounds of E. laetevirens and 80 compounds of E. umbellatum var. majus, accounting for 95.41% and 98.37%, were identified, respectively. The major components of E. laetevirens oil were phytol (667.4 mu g/100 g fresh samples), neophytadiene (335.2 mu g) and gamma-himachalene (49.8 mu g). On the other hand, E. umbellatum var. majus oil contained phytol (402.3 mu g), linoleic acid (289.4 mu g) and palmitic acid (241.4 mu g) as the major components. GC-MS/O and AEDA showed that (2E)-hexenal and (2E,4E)-nonadienal were most aroma compounds of E. laetevirens oil. It seems that these components make the green-floral odor. On the other hands, it seems that (2E)-hexenal, (3Z)-hexenol and 1-octen-3-ol make the green-oily odor of E. umbellatum var. majus oil.