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Chemical structure of corydaline. 

Chemical structure of corydaline. 

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Corydaline is a bioactive alkaloid with various antiacetylcholinesterase, antiallergic, and antinociceptive activities found in the medicinal herb Corydalis Tubers. The inhibitory potential of corydaline on the activities of seven major human cytochrome P450 and four UDP-glucuronosyltransferase enzymes in human liver microsomes was investigated usi...

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... tubers, the roots of Corydalis yanhusuo W.T. Wang, have long been used as an herbal drug for their analgesic and anti-ulcer effects [1][2][3]. Corydaline, 2,3,9,10-tetramethoxy-13-methyl- 5,8,13,13a-tetrahydro-6H-isoquino[3,2-a]isoquinoline (Figure 1), is isolated from Corydalis tubers and has been demonstrated to show antiacetylcholinesterase [4][5][6] and antibutylcholinesterase activity [4], antiallergic activity [7], and antinociceptive activity [8]. Corydaline also promotes gastric emptying and facilitates gastric accommodation [9]. Use of herbal medicine and botanical drugs to prevent common illness is on the rise among the global population [10]. Because botanical drugs share the same metabolic and transport proteins, including cytochrome P450 (CYP) enzymes, UDP-glucuronosyltransferase (UGT) enzymes, and drug transporters, such as P-glycoprotein, with commonly used drugs, the potential for herb-drug interactions is substantial [11]. Several medicinal herbs, including garlic (Allium sativum), ginkgo (Ginko biloba), ginseng (Panax ginseng), milk thistle (Silybum marianum), licorice (Glycyrrhiza glabra), and St. John's wort (Hypericum perforatum), have been reported to cause such herb-drug interactions [12][13][14]. Therefore, interactions among therapeutic drugs, as well as interactions of drugs with food and herbal medications, have attracted considerable attention ...

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