滇产前胡的化学成分研究(2)
氧化前胡素 (Oxypeucedamin, 2):C16H14O5;H-NMR (CDCl3,600Hz) δ:1.41 (3H,s,H-4″), 1.48 (3H,s,H-5″), 3.31 (1H,dd,J=6.6,4.2Hz,H-2″), 4.50 (1H,dd,J=10.8,6.6Hz,H-1″b), 4.67 (1H,dd,J=10.8,4.2Hz,H-1″a), 6.37 (1H,d,J=10.2Hz,H-3), 7.02 (1H,d,J=2.4Hz,H-3′), 7.24 (1H,s,H-8), 7.68 (1H,d,J=2.4Hz ......
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