题目内容

42.温和酸水解可以切断的苷键有

A. 苷元与α-去氧糖之间
B. 苷元与葡萄糖之间
C. 葡萄糖之间
D. α-去氧糖之间
E. α-去氧糖与葡萄糖之间

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43.强心苷的薄层色谱或纸色谱常用的显色剂有

A. 香草醛-浓硫酸试剂
B. 香草醛-浓盐酸试剂
C. 25%三氯乙酸乙醇液
D. 碱性苦味酸试剂
E. 碱性3,5-二硝基苯甲酸试剂

能与发生呫吨氢醇试剂反应的化合物是

A. 羟基洋地黄毒苷
B. K-毒毛旋毛子苷
C. 洋地黄毒苷
D. K-毒毛旋花子麻苷
E. 异羟基洋地黄毒苷

45.下列属于2，6--去氧糖的是

A. β- D-葡萄糖
B. D-果糖
C. D-洋地黄毒糖
D-乙酰洋地黄毒糖
E. D-加拿大麻糖

Directions:In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived.You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2.Robot Management