Southwest Center for Natural Products Research and Commercialization, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona , 250 E. Valencia Road, Tucson, Arizona 85706, United States.
J Nat Prod. 2013 Oct 25;76(10):1860-5. doi: 10.1021/np400391p. Epub 2013 Sep 30.
Three new alkaloids, phomapyrrolidones A-C (1-3), bearing a cyclopenta[b]fluorene ring system were isolated from the mycelium extract of the endophytic fungal strain Phoma sp. NRRL 46751, inhabiting Saurauia scaberrinae. Methylation of 1 afforded its N-methyl derivative 4. The planar structures and relative configurations of 1-4 were elucidated by extensive spectroscopic analysis. Phomapyrrolidones B (2) and C (3) exhibited weak antitubercular activity at subcytotoxic concentrations.
从内生真菌 Phoma sp. NRRL 46751 的菌丝体提取物中分离得到了三个新的生物碱,phomapyrrolidones A-C(1-3),它们都含有一个环戊[b]芴环系统。1 通过甲基化得到了它的 N-甲基衍生物 4。通过广泛的光谱分析阐明了 1-4 的平面结构和相对构型。phomapyrrolidones B(2)和 C(3)在亚细胞毒性浓度下表现出微弱的抗结核活性。