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Phytochemicals isolated from M. arvense: mussaenoside (46), mussaenosidic acid (47), melampyroside (48), 8-epi-loganin (49), and aucubin (16); batsioside (50) and agnuside (51) are found in V. grandifolia leaves; brunneogaleatoside (52), an iridoid glucoside isolated from P. brunneogaleata
