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  • Title: Acetylcholinesterase inhibitors from the aerial parts of Corydalis speciosa.
    Author: Kim DK, Lee KT, Baek NI, Kim SH, Park HW, Lim JP, Shin TY, Eom DO, Yang JH, Eun JS.
    Journal: Arch Pharm Res; 2004 Nov; 27(11):1127-31. PubMed ID: 15595415.
    Abstract:
    In a bioassay-guided search for acetylcholinesterase inhibitors from Korean natural resources, four isoquinoline alkaloids, corynoxidine (1), protopine (2), palmatine (3), and berberine (4) have been isolated from the methanolic extract of the aerial parts of Corydalis speciosa. Structures of these compounds were elucidated on the basis of spectroscopic techniques. These compounds inhibited acetylcholinesterase activity in a dose-dependent manner, and the IC50 values of compounds 1-4 were 89.0, 16.1, 5.8, and 3.3 microM, respectively.
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