6-甲氧基-7-羟基香豆素的H-4信号是 A. 7. 60 (1H, J=

天天题库2019-12-17 34

问题 6-甲氧基-7-羟基香豆素的H-4信号是A.

7. 60 (1H, J= 9. 5Hz)B.

6. 85 (1H, d, J= 9. 5Hz)C.

6.26 (1H, J = 9. 5Hz)D.

3. 95 (1H, d, J=9. 5Hz)E.

6. 91 (1H, d, J =9. 5Hz)

选项

答案A

解析

转载请注明原文地址:https://ti.zuoweng.com/ti/YuwCKKKQ

相关试题推荐

随机试题