地西泮的化学结构式是

A、[img=~/QImg/Tiles/YA54_051_17_
A、gif]
B、[img=~/QImg/Tiles/YA54_051_17_
B、gif]
C、[img=~/QImg/Tiles/YA54_051_17_
C、gif]
D、[img=~/QImg/Tiles/YA54_051_17_
D、gif]
E、[img=~/QImg/Tiles/YA54_051_17_
E、gif]