anhydride (5) provided the unstable product 6, for which the NMR spectral data are quite different from those reported for the ring system of jenamidine A. This suggests that the proposed structures 1 to 3 of jenamidines A to C should be revised to 8 to 10.
2,3-二氢-4-
吡啶酮(4)与
异戊酸酐(5)的反应提供了不稳定的产物6,其NMR光谱数据与报告的啶A的环状体系完全不同。拟议中的A至C的结构1至3应该修改为8至10。