The volatile components obtained from drug pair (DP) Pogostemon cablin (P. cablin)-Perilla frutescens (P. frutescens) and its single herbs were analyzed for the first time by gas chromatography-mass spectrometry (GC-MS) combined with three chemometric resolution methods, namely alternative moving window factor analysis (AMWFA), heuristic evolving latent projections (HELP) and selective ion analysis (SIA). Temperature-programmed retention indices (PTRIs) were also used together with mass spectra for tentative identification of the essential oil ...
