单选题下列化合物结构中,既有黄酮结构又有木脂素结构的是()A 银杏素B 五味子素C 水飞蓟素D 紫草素E 大黄素...
Monday, May 15, 2023
Wednesday, September 21, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
单选题可以采用升华法制取的是()A 挥发油B 生物碱C 咖啡因D 香豆素E 黄酮...
Tuesday, March 7, 2023
Wednesday, September 14, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
单选题满山红中祛痰的有效成分是()A 槐二醇B 芦丁C 金丝桃苷D 杜鹃素E 槲皮素...
Friday, June 2, 2023
单选题为抗胆碱药的是()A 四氢巴马亭B 山莨菪碱C 可待因D 甲基麻黄碱E 以上都不是...
Tuesday, April 2, 2024
单选题属于苯丙胺类生物碱的是()A 秋水仙碱B 阿托品C 可待因D 苦参碱E 麻黄碱...
Tuesday, July 4, 2023
Friday, September 16, 2022
Friday, September 16, 2022
单选题苦参中的生物碱所具有的生物活性是()A 镇痛作用B 抗菌作用C 利尿作用D 强心作用E 抗肿瘤作用...
Wednesday, July 12, 2023
Thursday, September 22, 2022
单选题提取黄酮苷元宜用溶剂为()A 冷水B 乙酸乙酯C 甲醇D 0.1%盐酸E 沸水...
Saturday, January 6, 2024
Thursday, September 22, 2022
Tuesday, September 20, 2022
Thursday, September 22, 2022