1 H - NMR ( CDCl 3 ) : 8 . 061 ( d , 1 H , J = 8 . 8 Hz ) , 7 . 356 ~ 7 . 342 ( m , 5 H ) , 7 . 006 ( d , 1 H , J = 8 . 4 Hz ) , 6 . 571 ( dd , 1 H , J = 8 . 8 , 1 . 6 Hz ) , 6 . 558 ( d , 1 H , J = 14 . 4 Hz ) , 6 . 513 ( d , 1 H , J = 4 . 4 Hz ) , 6 . 375 ( d , 1 H , J = 10 Hz ) , 5 . 458 ( d , 1 H , J = 10 Hz ) , 5 . 125 ( s , 2 H ) , 5 . 092 ( s , 2 H ) , 4 . 519 ( d , 2 H , J = 6 . 4 Hz ) , 4 . 004 ( t , 2 H , J = 11 . 2 Hz ) , 3 . 537 ( t , 1 H , J = 6 . 4 Hz ) , 1 . 803 ~ 1 . 749 ( m , 2 H ) , 1 . 532 ~ 1 . 409 ( m , 2 H ) , 1 . 365 ( s , 6 H ) , 0 . 977 ( t , 3 H , J = 7 . 2 Hz )