화합물 74 LC / MS A : 100 % 순도 , UV = 214 nm , Rt = 1 . 34 분 , ESI 334 ( M + H ) +. 1 H NMR ( 500 MHz , MeOD ) δ 7 . 21 ( d , J = 7 . 3 Hz , 1 H ) , 6 . 43 ( d , J = 7 . 3 Hz , 1 H ) , 4 . 52 ( brs , 1 H ) , 4 . 36 ( t , J = 8 . 6 Hz , 2 H ) , 4 . 14 ? 4 . 01 ( m , 2 H ) , 3 . 80 ( s , 2 H ) , 3 . 41 ( d , J = 7 . 0 Hz , 4 H ) , 2 . 79 ? 2 . 65 ( m , 4 H ) , 1 . 96 ? 1 . 82 ( m , 2 H ) .