1 H NMR ( 700 . 03 MHz , DMSO - d 6 ) δ 0 . 84 - 0 . 89 ( 2 H , m ) , 1 . 15 - 1 . 18 ( 1 H , m ) , 1 . 20 - 1 . 26 ( 2 H , m ) , 1 . 51 - 1 . 54 ( 1 H , m ) , 1 . 63 - 1 . 69 ( 3 H , m ) , 1 . 76 ( 2 H , d ) , 2 . 14 ( 2 H , d ) , 2 . 46 ( 4 H , t ) , 3 . 60 ( 4 H , t ) , 7 . 59 ( 1 H , d ) , 8 . 24 ( 1 H , d ) ; m / z = 369 [ M + H ] +.