短刺小克银汉霉对甘草次酸的微生物转化(4)
化合物3 白色粉末,转化率1.91%。[α]20D+124.6(c 0.61,CH3OH);ESI-MS m/z 503.2[M+H]+;1H-NMR(CD3OD,600 MHz)δ: 5.66(H,s,H-12),4.23(H,dd,J=4.8,11.4 Hz,H-15),4.00(H,dd,J=4.8,11.4 Hz,H-7),3.13(H,dd,J=4.8,12.0 Hz,H-3),2.64(H,ddd,J=3.6,3.6,10.2 Hz,H-1),2.29(H,s,H-9),2.18(H,br d,J=11.4 Hz,H-18),2.05(H,dd,J=12.6,12.6 Hz,H-16α),1.90(H,m,overlapped,H-21),1.83(H,br d,J=13.2 Hz,H-19),1.73(H,dd,J=4.2,12.6 Hz,H-6α),1.64(H,m,overlapped,H-2),1.64(H,m,overlapped ......
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