鸭跖草的化学成分研究(3)
化合物9 淡黄色粉末,ESI-MS m/z 545 [M+Na]+。1H-NMR(MeOH-d4,300 MHz)δ: 6.88(1H,d,J=1.5 Hz,H-2),6.68(1H,d,J= 8.3 Hz,H-5),6.70(1H,dd,J= 8.3,1.5 Hz,H-6),6.66(1H,s,H-6′),6.64(1H,s,H-2′),3.84(3H,s,3-OMe),3.86(3H,s,3′-OMe),4.28(1H,d,J=7.6 Hz,H-1″);13C-NMR(MeOH-d4,75 MHz)δ: 149.1(C-3),147.6(C-4),147.5(C-4′),145.3(C-3′),137.1(C-1),134.8(C-5′),129.8(C-1′),119.9(C-6),118.3(C-6′),116.2(C-5),114.2(C-2′),110.9(C-2) ......
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