Ratanhiaphenol III from Ratanhiae Radix is a PTP1B Inhibitor - Heiss, Elke H.; Baumgartner, Lisa; Schwaiger, Stefan; Heredia, Raul Jimenez; Atanasov, Atanas G.; Rollinger, Judith M.; Stuppner, Hermann; Dirsch, Verena M. (Planta Medica, 2012)