Table 1. HPLC analysis conditions

Mobile phase	A: water, B: acetonitrile
Flow rate	1 mL/min
Column	Phenomenex Gemini 5 μm C18 110Å 250 × 4.6 nm
Column temperature	30°C
Wave length	254 nm
Runtime	10 min
Method	Isocratic 80%(A) : 20%(B)