依据药物的化学结构判断,属于前药型的β受体激动剂是
A 班布特罗<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/14474300_0.gif"> B
沙丁胺醇<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/14474300_0_1.gif"> C
沙美特罗<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/14474300_0_2.gif"> D
丙卡特罗<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/14474300_0_3.gif"> E
福莫特罗<img border="0" alt="" src="https://img.weimei168.com/uploads/upimg/20230210/14474300_0_4.gif">