Figure 2.

Score and loading plots for unsupervised, pareto-scaled two-dimensional PCA of NMR spectral data obtained for aqueous or chloroform extracts of opium poppy latex. NMR spectra for aqueous and chloroform extracts were obtained in D₂O and CDCl₃, respectively. For score plots, samples representing six plant varieties are color coded as follows: L, red; M, orange; P, blue; T, green; 11, yellow; 40, pink. For loading plots, bin numbers corresponding to those listed in Table I (aqueous) and Supplemental Table S1 (chloroform) are indicated.