Figure 5 | Scientific Reports

Figure 5

From: Integrated comparative metabolite profiling via NMR and GC–MS analyses for tongkat ali (Eurycoma longifolia) fingerprinting and quality control analysis

Figure 5

Principal component analysis (PCA) and Hierarchical cluster analysis (HCA) of E. longifolia commercial preparations GC–MS dataset. (A) Score Plot of PC1 vs. PC2. (B) Loading plot for PC1 and PC2 showing features the have the major contributing to samples discrimination. (C) HCA of GC–MS dataset shows two main cluster: cluster (I) for the authentic samples and cluster II) for the Nu-prep LELAKI® and Naturelle® samples signifying their heterogeneity and compositional differences.

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