Column : Shodex RSpak RP18-415 (4.6mmID*150mm) Eluent : (A); 0.1% TFA aq. (B); 0.1% TFA in CH3CN Linear gradient: 0 to 30min, 30% (B) to 50% (B) Flow rate : 1.0mL/min Detector : UV(220nm) Column temp. : Room temp.