1 H - NMR ( CDCl 3 ) : 7 . 691 ( d , 1 H , J = 7 . 6 Hz ) , 7 . 416 ~ 7 . 358 ( m , 5 H ) , 7 . 267 ( d , 1 H , J = 9 . 2 Hz ) , 7 . 156 ( s , 1 H ) , 6 . 983 ( d , 1 H , J = 8 . 4 Hz ) , 6 . 526 ( d , 1 H , J = 8 Hz ) , 6 . 383 ( d , 1 H , J = 9 . 6 Hz ) , 5 . 524 ( d , 1 H , J = 6 . 4 Hz ) , 5 . 485 ( d , 1 H , J = 10 Hz ) , 5 . 116 ( q , 2 H , J = 16 , 11 . 2 Hz ) , 4 . 619 ( d , 1 H , J = 11 . 6 Hz ) , 4 . 464 ( d , 1 H , J = 11 . 6 Hz ) , 4 . 233 ( dd , 1 H , J = 10 . , 2 . 4 Hz ) , 3 . 859 ( q , 1 H , J = 10 , 8 . 4 Hz ) , 1 . 374 ( s , 3 H ) , 1 . 356 ( s , 3 H )