1 H - NMR ( CDCl 3 , 500 MHz ) δ 6 . 99 ( 1 H , d , J = 8 . 1 Hz , H - 2 '), 6 . 94 ( 2 H , d , J = 8 . 1 Hz , H - 2 , 3 '), 6 . 92 ( 1 H , s , H - 6 '), 6 . 84 ( 1 H , d , J = 8 . 1 Hz , H - 3 ) , 6 . 84 ( 1 H , s , H - 6 ) , 5 . 47 ( 2 H , d , J = 5 . 8 Hz , H - 7 ', 7 ''), 4 . 65 ( 1 H , d , J = 8 . 3 Hz , H - 7 ) , 4 . 15 ( 1 H , m , H - 8 ) , 3 . 89 ( 6 x - OCH 3 ) , 2 . 31 ( 2 H , m , H - 8 ', 8 ''), 1 . 17 ( 3 H , d , J = 6 . 2 Hz , H - 9 ) , 0 . 73 ( 6 H , d , J = 6 . 3 Hz , H - 9 ', 9 '')