1 H NMR ( 400 MHz , 메탄올 - d 4 ) δ ppm 3 . 74 - 3 . 84 ( m , 1 H ) 3 . 92 - 4 . 00 ( m , 1 H ) 4 . 12 - 4 . 19 ( m , 1 H ) 4 . 62 - 4 . 74 ( m , 1 H ) 5 . 37 - 5 . 57 ( m , 1 H ) 6 . 41 - 6 . 52 ( m , 1 H ) 7 . 47 - 7 . 55 ( m , 1 H ) 7 . 57 - 7 . 64 ( m , 2 H ) 8 . 03 - 8 . 14 ( m , 1 H ) 8 . 36 - 8 . 46 ( m , 1 H ) 8 . 86 ( s , 1 H )