申論 5請依下列資料推斷出化學結構式。（15 分）分子式為CHOUV (MeOH) λ: 212, 227, 273, 314 nmmaxIR (KBr) υ 1627 cm-1max1H-NMR (CDCl, 500 MHz) δ 2.53 (3H, s), 3.81 (3H, s), 6.39 (1H, d, J = 2.3 Hz),6.41 (1H, dd, J = 8.8, 2.3 Hz), 7.60 (1H, d, J = 8.8 Hz, H-3), 12.72 (1H, s,DO exchangeable).13C-NMR (CDCl, 125 MHz) δ 26.20, 55.55, 100.81, 107.62, 113.89, 132.28, 165.25,成分來源：牡丹皮