Column : Shodex Asahipak C4P-50 4D (4.6mmID*150mm) Eluent : (A); 0.1% TFA aq./CH3CN=90/10 (B); 0.1% TFA aq./CH3CN=5/95 Linear gradient: 0 to 30min, (A) to (B) Flow rate : 0.6mL/min Detector : UV(280nm) Column temp. : 30deg-C