The separation was performed on Luna C18(2) column with methanol -water(92: 8)as mobile phase and pH was adjusted to 9. 5 +0. 3 with triethylamine.

• 液相色谱条件为色谱柱:Luna C_(18)(2)；流动相:甲醇-水(92:8)；用三乙胺调至pH为9.；5±0