Additional file 2: Table S2. Alkaloids, coumarins, limonoids, carotenoids and phenolic acids isolated from Citrus species. The table summarized alkaloids, coumarins, limonoids, carotenoids and phenolic acids from Citrus species including C. aurantifolia, C. aurantium, C. bergamia, C. canaliculata, C. clementina, C. grandis, C. hassaku, C. junos, C. kinokuni, C. leiocarpa, C. limon, C. limonimedica, C. maxima, C. microcarpa, C. myrtifolia, C. paradisi,, C. reticulate,C. sinensis, C. tachibana and C. unshiu