1 H NMR ( 399 . 9 MHz , CDCl 3 ) δ 1 . 41 ( 3 H , d ) , 2 . 50 - 2 . 56 ( 2 H , m ) , 2 . 60 - 2 . 66 ( 2 H , m ) , 3 . 44 ( 1 H , q ) , 3 . 55 - 3 . 64 ( 4 H , m ) , 7 . 03 ( 1 H , d ) , 7 . 24 - 7 . 35 ( 5 H , m ) , 7 . 89 ( 1 H , d ) ; m / z = 377 [ M + H ] +.