1 H NMR ( 300 MHz , 클로로포름 - d ) δ ppm 1 . 42 ( s , 9 H ) 1 . 58 ( br . s . , 3 H ) 1 . 87 - 2 . 02 ( m , 2 H ) 3 . 29 - 3 . 45 ( m , 2 H ) 3 . 65 ( s , 1 H ) 3 . 81 ( t , J = 1 . 00 Hz , 1 H ) 3 . 93 ( s , 3 H ) 3 . 97 - 4 . 07 ( m , 2 H ) 4 . 43 ( d , J = 6 . 42 Hz , 2 H ) 6 . 99 ( d , J = 8 . 31 Hz , 1 H ) 7 . 45 - 7 . 69 ( m , 5 H ) 7 . 76 ( dd , J = 8 . 31 , 2 . 27 Hz , 1 H ) 8 . 29 ( d , J = 2 . 64 Hz , 1 H ) 8 . 41 - 8 . 45 ( m , 2 H ) 8 . 69 ( s , 1 H ) .