School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
Chem Commun (Camb). 2011 Jan 28;47(4):1222-4. doi: 10.1039/c0cc03572f. Epub 2010 Nov 23.
Five new dimeric sesquiterpene lactones, neojaponicone A (1) and japonicones M-P (2-5) were isolated from the aerial part of Inula japonica. Neojaponicone A (1) has an unprecedented carbon skeleton with an unusual valerolactone system formed between a guaianolide and an eudesmane. The structure and absolute configuration of 1 were established by extensive analysis of spectroscopic data and computational approaches.
从旋覆花（Inula japonica）的地上部分分离得到了五个新的二聚倍半萜内酯，即 neo 日本酮 A（1）和日本酮 M-P（2-5）。neo 日本酮 A（1）具有前所未有的碳骨架，在一个愈创木烷和一个艾里莫芬烷之间形成了一个不寻常的缬草酸内酯系统。通过广泛的光谱数据分析和计算方法，确定了 1 的结构和绝对构型。
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