题目内容

关于H1受体拮抗剂构效关系的叙述，正确的是（）

A. 光学异构体均显示相同的抗组胺活性
B. 结构中两个苯环处于一个平面时具有最大的抗组胺活性
C. 芳环与叔氮原子距离为0.5-0.6nm
D. 几何异构体均显示相同的抗组胺活性

查看答案

搜索结果不匹配？点我反馈

更多问题

富马酸酮替芬属于（）抗过敏药

A. 氨基醚类
B. 乙二胺类
C. 丙胺类
D. 三环类

H1受体拮抗剂的结构类型有

A. 氨基醚类
B. 乙二胺类
C. 丙胺类
D. 三环类

Write the correct word for the following meaning.

1. A: __________ happened to your leg?B: I fell and broke it.A: I can see that, but how did you break it ?B: It snowed last night, this morning I decided to go skiing.A: Say no more. I can guess the rest.2. A: Why did you close the window?B: _ I’m cold.A: I can’t it ! It’s a hot day and you are cold. Are you sick?B: No, I’m not it’s not a hot day. It’s cold.3. A: _____ to your clothes?B: I was out in the rain.A: _ forget your umbrella at home?B: No, I had it with me the wind broke it.4. A: _____ you yesterday?B: I was at the hospital with my mom.A: _ did you go there?B: My mom had a terrible stomachache and she also felt dizzy.