1 H - NMR ( CDCl 3 , 300 MHz ) : 7 . 64 ( q , 4 H ) , 7 . 59 ( d , 4 H ) , 7 . 44 ( d , 4 H ) , 7 . 29 ( q , 4 H ) , 6 . 12 ( q , 2 H ) , 2 . 33 - 2 . 29 ( m , 2 H ) , 1 . 75 - 1 . 51 ( m , 14 H ) , 0 . 97 - 0 . 86 ( m , 20 H ) . )