1 H - NMR ( CDCl 3 ) : 7 . 707 ( d , 1 H , J = 8 Hz ) , 7 . 649 ~ 7 . 628 ( m , 2 H ) , 7 . 314 ~ 7 . 187 ( m , 3 H ) , 7 . 078 ( d , 1 H , J = 8 Hz ) , 7 . 013 ( s , 1 H ) , 6 . 601 ( d , 1 H , J = 8 . 4 Hz ) , 6 . 544 ( d , 1 H , J = 10 Hz ) , 5 . 668 ( d , 1 H , J = 10 Hz ) , 5 . 065 ( s , 2 H ) , 4 . 587 ( s , 2 H ) , 3 ( br , 1 H ) , 2 . 676 ~ 2 . 619 ( m , 2 H ) , 2 . 433 ( s , 3 H ) , 1 . 429 ( s , 6 H ) , 1 . 179 ( t , 3 H , J = 6 . 4 Hz )