1 H NMR ( 400 MHz , 클로로포름 - d ) δ = 8 . 90 ( s , 1 H ) , 8 . 16 ( s , 1 H ) , 6 . 26 ( dd , J = 2 . 0 , 18 . 4 Hz , 1 H ) , 5 . 98 - 5 . 85 ( m , 1 H ) , 5 . 90 - 5 . 73 ( m , 1 H ) , 5 . 63 ( ddd , J = 4 . 9 , 7 . 5 , 17 . 7 Hz , 1 H ) , 5 . 12 - 5 . 05 ( m , 1 H ) , 4 . 98 ( dd , J = 1 . 6 , 10 . 2 Hz , 1 H ) , 4 . 54 - 4 . 50 ( m , 2 H ) , 4 . 31 ( dd , J = 5 . 1 , 12 . 9 Hz , 1 H ) , 3 . 30 ( t , J = 7 . 4 Hz , 2 H ) , 2 . 70 - 2 . 64 ( m , 2 H ) , 2 . 19 ( s , 3 H ) , 2 . 05 ( s , 3 H ) .