The non-natural enantiomeric forms of narciclasine and lycoricidine ((-)-1 and (-)-2, respectively), as well as congeners 3-6 are available through chemoenzymatic synthesis. Accordingly, they have now been tested for their cytotoxic effects in a 13-member human cancer cell-line panel and found to be only weakly active. In contrast, an authentic sample of the natural enantiomeric form of narciclasine
可以通过
化学酶促合成获得
水杨酸和二十二碳四烯酸(分别为(-)-1和(-)-2)以及同类物3-6的非天然对映体形式。因此,现在已经在13人的人类癌
细胞系中测试了它们的细胞毒性作用,发现它们的活性很弱。相反,发现天然的对映体形式的
水仙子碱((+)-1)的真实样品在同一屏幕中具有很高的活性。