1 H NMR ( 400 MHz , CDCl 3 ) δ = 8 . 63 ( s , 1 H ) , δ = 8 . 61 ( s , 1 H ) , 8 . 04 - 8 . 00 ( m , 2 H ) , 7 . 99 ( s , 1 H ) , 7 . 90 ( s , 1 H ) , 7 . 65 - 7 . 44 ( m , 8 H ) , 7 . 40 - 7 . 31 ( m , 4 H ) , 7 . 25 - 7 . 21 ( m , 4 H ) , 6 . 15 - 5 . 89 ( m , 5 H ) , 5 . 61 ( dd , J = 52 . 0 , 5 . 1 Hz , 1 H ) , 5 . 55 ( ddd , J = 51 . 2 , 4 . 7 , 2 . 7 Hz , 1 H ) 5 . 51 - 5 . 42 ( m , 1 H ) , 5 . 31 - 5 . 22 ( m , 2 H ) , 5 . 11 ( dd , J = 3 . 9 , 9 . 8 Hz , 2 H ) , 5 . 04 - 4 . 95 ( m , 4 H ) , 4 . 55 - 4 . 37 ( m , 7 H ) , 4 . 29 - 4 . 12 ( m , 3 H )