화합물 23 - E 2 LC / MS A : 98 % 순도 , UV = 214 nm , Rt = 1 . 48 분 , ESI 437 ( M + H ) +. 1 H NMR ( 500 MHz , MeOD ) δ 7 . 59 ( dd , J = 6 . 4 , 2 . 8 Hz , 2 H ) , 7 . 48 ? 7 . 41 ( m , 3 H ) , 7 . 17 ( d , J = 7 . 3 Hz , 1 H ) , 6 . 39 ( d , J = 7 . 3 Hz , 1 H ) , 4 . 43 ( s , 1 H ) , 3 . 76 ( s , 1 H ) , 3 . 42 ? 3 . 36 ( m , 2 H ) , 3 . 20 ( t , J = 6 . 9 Hz , 2 H ) , 3 . 06 ( d , J = 11 . 6 Hz , 1 H ) , 2 . 94 ( t , J = 10 . 5 Hz , 1 H ) , 2 . 80 ( s , 1 H ) , 2 . 71 ( t , J = 6 . 2 Hz , 2 H ) , 2 . 58 ? 2 . 51 ( m , 2 H ) , 2 . 48 ? 2 . 38 ( m , 1 H ) ) , 2 . 01 ( tt , J = 22 . 5 , 11 . 2 Hz , 3 H ) , 1 . 92 ? 1 . 79 ( m , 5 H ) . 키 랄 S , S - Whelk - O 1 A ( 45 % MeOH ) : ee 100 %, Rt = 3 . 04 분 .