Corylucinine, a new alkaloid from Corydalis cava (Fumariaceae), and its cholinesterase activity |
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Authors: | Novák Zdenĕk Chlebek Jakub Opletal Lubomír Jiros Pavel Macáková Katerina Kunes Jiri Cahlíková Lucie |
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Institution: | Department of Inorganic and Organic Chemistry, Faculty of Pharmacy, Charles University, , 500 05 Hradec Králové, Czech Republic. |
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Abstract: | A new benzyldihydroisoquinoline alkaloid (1) was isolated from the tubers of Corydalis cava and named corylucinine. Additionally, 8-trichloromethyl-7,8-dihydropalmatine (2), an isolation artifact of tetrahydropalmatine, was obtained. The structures were established by spectroscopic (including 2D NMR and optical rotation) and HR-ESI-MS methods. Both compounds were tested for human blood acetylcholinesterase (HuAChE) and human plasma butyrylcholinesterase (HuBuChE) inhibitory activity. In comparison with the used standards, both compounds showed only moderate inhibitory activity against HuAChE (IC50,. HuAChE = 127.6 +/- 5.2 microM for 1, and IC50, HuAChE = 82.9 +/- 3.9 microM for 2) and none against HuBuChE. |
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