A series of (S)-1-phenyl-3,4-dihydroisoquinoline-2(1H)-carboxamide derivatives was synthesized and evaluated for inhibitory activity against monoamine oxidase (MAO)-A and-B, acetylcholine esterase (AChE), and butyrylcholine esterase (BChE). Four compounds (2i, 2p, 2t, and 2v) showed good inhibitory activity against both MAO-A and MAO-B, and two compounds (2d and 2j) showed selective inhibitory activity against MAO-A, with IC50 values of 1.38 and 2.48 µM, respectively. None of the compounds showed inhibitory activity against AChE; however, 12 compounds showed inhibitory activity against BChE. None of the active compounds showed cytotoxicity against L929cells. Molecular docking revealed several important interactions between the active analogs and amino acid residues of the protein receptors. This research paves the way for further study aimed at designing MAO and ChE inhibitors for the treatment of depression and neurodegenerative disorders.

中文翻译：

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(S)-N-Benzyl-1-phenyl-3,4-dihydroisoqunoline-2(1H)-carboxamide 衍生物，单胺氧化酶和胆碱酯酶的多靶点抑制剂：设计、合成和生物活性。

合成了一系列 (S)-1-phenyl-3,4-dihydroisoquinoline-2(1H)-carboxamide 衍生物，并评估了对单胺氧化酶 (MAO)-A 和-B、乙酰胆碱酯酶 (AChE) 和丁酰胆碱酯酶 (BChE)。四种化合物（2i、2p、2t和2v）对MAO-A和MAO-B均表现出良好的抑制活性，两种化合物（2d和2j）对MAO-A表现出选择性抑制活性，IC50值为1.38和2.48 µM，分别。这些化合物均未显示出对 AChE 的抑制活性；然而，有 12 种化合物显示出对 BChE 的抑制活性。没有一种活性化合物显示出对 L929 细胞的细胞毒性。分子对接揭示了活性类似物与蛋白质受体氨基酸残基之间的几个重要相互作用。