1 H NMR ( 400 MHz , 클로로포름 - d ) δ ppm 1 . 36 ( s , 9 H ) 3 . 03 ( s , 3 H ) 3 . 87 ( s , 3 H ) 4 . 38 ( s , 2 H ) 7 . 00 ( d , J = 1 . 00 Hz , 1 H ) 7 . 40 - 7 . 61 ( m , 5 H ) 8 . 02 ( d , J = 1 . 00 Hz , 1 H ) 8 . 22 ( s , 1 H ) 8 . 56 ( br . s . , 1 H ) 8 . 73 ( s , 1 H ) 8 . 83 ( br . s . , 1 H ) .