A new cardenolide, proceragenin, has been isolated from Calotropis procera. Its structure was determined as 7β,14β-dihydroxy-5α-card-20(22)-enolide through spectroscopic studies including 2D NMR and NOE difference measurement. Its biological screening showed antibacterial activity against both Gram positive and Gram negative bacteria.
毛豆
cocolu
ceeray23
丰知然
VDC
Jason
彭于彦祖
模糊中正
tuanheqi
十七
卡卡
pluto
无名老大
36456657
我是站长才怪
iNk
sutharsons
方羽
5度转角
不配.
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