Two new piperidine alkaloids, pipernonaline and piperundecalidine, were isolated from fruits of Piper longum L. (Piperaceae). Their structures were determined to be (2E, 8E)-N-[9-(3, 4-methylenedioxyphenyl)-2, 8-nonadienoyl]piperidine and (2E, 4E, 10E)-N-[11-(3, 4-methylenedioxyphenyl)-2, 4, 10-undecatrienoyl]piperidine, respectively, on the basis of spectral data.
                                    从Piper longum L.(胡椒科)的果实中分离得到两种新的
哌啶生物碱,胡椒
萘林和胡椒十卡啶。确定其结构为(2E, 8E)-N-[9-(3, 4-亚甲二氧基苯基)-2, 8-壬二烯酰基]
哌啶和(2E, 4E, 10E)-N-[11-(3, 4根据光谱数据,分别得到(亚甲基二氧基苯基)-2,4,10-十一碳
三烯酰基]
哌啶。