ic acid (0.00 g, 00.00 mmol), HATU (0.0 g, 00.0 mmol) and TEA (0.00 g, 00.00 mmol) were placed in a 00 ml eggplant-shaped flask which containing 00 ml of dry acetonitrile and stirred in ice bath for 0 h. The chromatographic methods were as follows: flow rate, 0 ml/min; injection volume, 0.0 ml, mobile phase consisted of acetonitrile and water (00:00, v/v).  