[单选题]6-甲氧基-7-羟基香豆素的H-4信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的H-4信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的H-4信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的H-4信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的甲氧基的质子信号是( )。
[单选题]6-甲氧基-7-羟基香豆素的H-3信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的H-3信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的H-3信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的H-3信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J=9.
[单选题]6-甲氧基-7-羟基香豆素的甲氧基的质子信号是()A.87.60(1H,d,J=9.5Hz)B.86.85(1H,brs)C.86.26(1H,d,J