1 H - NMR ( CDCl 3 ) : 8 . 063 ( d , 1 H , J = 8 . 8 Hz ) , 7 . 433 ~ 7 . 336 ( m , 5 H ) , 7 . 043 ( d , 1 H , J = 8 Hz ) , 6 . 648 ( dd , 1 H , J = 8 . 8 , 2 . 4 Hz ) , 6 . 602 ( d , 1 H , J = 10 Hz ) , 6 . 559 ( d , 1 H , J = 8 Hz ) , 6 . 497 ( d , 1 H , J = 2 . 4 Hz ) , 5 . 648 ( d , 1 H , J = 9 . 6 Hz ) , 5 . 208 ( s , 2 H ) , 5 . 110 ( s , 2 H ) , 4 . 629 ( d , 2 H , J = 3 . 6 Hz ) , 3 . 990 ( m , 3 H ) , 1 . 815 ~ 1 . 744 ( m , 2 H ) , 1 . 486 ~ 1 . 396 ( m , 8 H ) , 0 . 928 ( t , 3 H , 7 . 2 Hz )