【单选题】【消耗次数：1】
以下有关奥美拉唑的叙述哪项是正确的（）。
①
不具有手性
②
其（R）-异构体的体内清除率大大低于（S）-异构体
③
体外无活性，是前体药物
④
属于质子泵抑制剂
⑤
在强酸性水溶液中不易分解
参考答案：
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