1 H NMR ( 700 . 03 MHz , DMSO - d 6 ) δ 1 . 06 - 1 . 10 ( 1 H , m ) , 1 . 24 - 1 . 26 ( 1 H , m ) , 1 . 69 - 1 . 71 ( 1 H , m ) , 1 . 79 ( 1 H , d ) , 1 . 91 - 1 . 94 ( 1 H , m ) , 1 . 96 ( 1 H , d ) , 2 . 09 - 2 . 12 ( 1 H , m ) , 2 . 17 - 2 . 21 ( 1 H , m ) , 2 . 47 ( 3 H , s ) , 2 . 70 ( 1 H , d ) , 2 . 85 - 2 . 87 ( 1 H , m ) , 2 . 98 ( 1 H , d ) , 3 . 02 - 3 . 06 ( 1 H , m ) , 3 . 15 ( 2 H , t ) , 4 . 13 ( 1 H , d ) , 4 . 19 ( 1 H , d ) , 6 . 37 ( 1 H , s ) , 7 . 05 ( 1 H , s ) , 7 . 33 - 7 . 36 ( 1 H , m ) , 7 . 56 ( 1 H , d ) , 7 . 62 ( 1 H , d ) , 7 . 68 - 7 . 69 ( 1 H , m ) , 8 . 19 ( 1 H , d ) , 8 . 25 ( 1 H , d ) ; m / z = 497 [ M + H ] +.