1 H - NMR ( CDCl 3 ) : 8 . 047 ( d , 1 H , J = 8 . 8 Hz ) , 7 . 375 ~ 7 . 279 ( m , 5 H ) , 6 . 574 ( dd , 1 H , J = 9 . 2 , 2 . 4 Hz ) , 6 . 495 ( d , 1 H , J = 2 . 4 Hz ) , 6 . 479 ( s , 1 H ) , 6 . 330 ( d , 1 H , J = 10 Hz ) , 5 . 405 ( d , 1 H , J = 9 . 6 Hz ) , 5 . 120 ( s , 2 H ) , 5 . 078 ( s , 2 H ) , 4 . 618 ( d , 2 H , J = 6 . 4 Hz ) , 4 . 126 ~ 4 . 044 ( m , 2 H ) , 3 . 156 ( br , 1 H ) , 2 . 325 ( s , 3 H ) , 1 . 417 ( t , 3 H , J = 7 . 2 Hz ) , 1 . 359 ( s , 6 H )