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Platycodi radix extract standardized to platycodin D was tested at two concentrations, 20% and 40% platycodin D. Te extracts were tested at their platycodin D contents from 10−3 M to 10−5 M. Te extracts with 10−4 M and above completely inhibited angiogenesis compared with the media control (P<0.001). FBS=fetal bovine serum.
