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关于硫酸沙丁胺醇，下列叙述中错误的是

A．属于儿茶酚类药物
B．是选择性肾上腺素β₂受体激动剂
C．临床用于防治各种哮喘
D．有一个手性碳原子，R(—)构型体活性高于S(+)构型体
E．以乙醇为母体，具有叔丁胺基和4-羟基-3-羟甲基苯基结构