Discrimination of young and mature leaves of Melicope ptelefolia using 1H NMR and multivariate data analysis

► PCA showed a clear discrimination between the young and mature leaves extracts by PC3 and PC4. ► PC3 and PC4 accounted for 11.2% and 8.5% of variation, respectively. ► Young leaves contain higher levels of p-O-geranylcoumaric acid, 2,4,6-trihydroxy-3-geranylacetophenone, 2,4,6-trihydroxy-3-prenylacetophenone, and fatty acids.