[物理性质] |
白色结晶, 熔点155~156°[1]。无色片状结晶 (苯), 熔点 154~155°, [α]20D +8.2°(c=2.07, 氯仿); UVλEtOHmax nm (logε): 281.5 (4.18), 288 (4.13, 曲折点), 312 (3.47, 肩峰); IRνKBrmax cm-1: 3270, 2940, 1611, 1587, 1526, 1480; NMR (CDCl3) δ: 1.42 (3H×2, s, CH3-2"), 2.87 (1H, d, 6.0, H-4eq), 2.89 (1H, d, 10.0, H-4ax), 3.3~3.4 (1H, m, H-3ax), 4.00 (1H, t, 10, H-2ax), 4.35 (1H, q, 10和3.5, H-2eq), 5.53 (1H, d, 10, H-3"), 5.80 (2H, br.s, OH-2'和4', 能被 D2O 消除), 6.23 (1H, d, 2, H-3'), 6.31 (1H, dd, 8和2, H-5'), 6.34 (1H, d, 8, H-6), 6.61 (1H, d, 10, H-4"), 6.76 (1H, d, 8, H-5), 6.86 (1H, d, 8, H-6'); MS m/e: 324 (M+)[2]。 |