1 H NMR ( 700 . 03 MHz , DMSO - d 6 ) δ 3 . 15 ( 4 H , t ) , 3 . 79 ( 4 H , t ) , 7 . 08 - 7 . 11 ( 1 H , m ) , 7 . 21 - 7 . 22 ( 1 H , m ) , 7 . 32 - 7 . 35 ( 1 H , m ) , 7 . 45 - 7 . 47 ( 1 H , m ) , 7 . 67 ( 1 H , d ) , 8 . 30 ( 1 H , d ) ; m / z = 383 [ M + H ] +.