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Chang, Fang-Rong,Wu, Chin-Chung,Hwang, Tsong-Long,Patnam, Ramesh,Kuo, Reen-Yen,Wang, Wei-Ya,Lan, Yu-Hsuan,Wu, Yang-Chang The Pharmaceutical Society of Korea 2003 Archives of Pharmacal Research Vol.26 No.7
Quinazolinones, 2-substituted and 3-substituted, mainly synthesized by microwave irradiation, were subjected to anti-platelet aggregation and inhibition of superoxide anion generation assays. Interestingly, 2-phenyl-4-quinazolinone (4) exhibited significant inhibitory activities toward platelet aggregation and neutrophil activation, and it might therefore serve as a prototype lead compound.
Ping-Chung Kuo,Yann-Lii Leu,Tsong-Long Hwang,Ying-Ting Lin,Yuh-Chi Kuo 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.5
In total, forty six compounds, including the novel compound lobechine (1), were characterized from the methanol extracts of Lobelia chinensis. The chemical structures of known metabolites were identified by comparing their spectroscopic and physical data with compounds reported in the literature. The structure of lobechine (1) was comprehensively established with the aid of 1D and 2D NMR spectroscopic analyses. In addition, selected isolates were screened for their inhibition of HSV-1 replication, superoxide anion generation, and elastase release. Among the tested compounds, scoparone (10) exhibited significant inhibition of superoxide anion generation with IC_50 of 6.14 ± 1.97 μM and lobechine (1) exhibited moderate inhibition of elastase release with IC_50 of 25.01 ± 6.95 μM, respectively.