443 8 . 83 - 8 . 81 ( 3 H , m ) , 8 . 38 ( 1 H , d ) , 8 . 30 ( 2 H , d ) , 8 . 10 - 8 . 06 ( 3 H , m ) , 7 . 98 ( 1 H , d ) , 7 . 89 ( 1 H , s ) , 7 . 81 - 7 . 78 ( 2 H , m ) , 7 . 60 - 7 . 28 ( 18 H , m )