1 H NMR ( 400 MHZ , 클로로포름 - D ) δ 7 . 93 ( D , J = 2 . 5 HZ , 1 H ) , 7 . 75 - 7 . 70 ( M , 1 H ) , 7 . 69 ( D , J = 2 . 5 HZ , 1 H ) , 6 . 86 ( DD , J = 4 . 3 , 2 . 8 HZ , 1 H ) , 6 . 45 ( DD , J = 4 . 3 , 1 . 4 HZ , 1 H ) .