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Relaxant effects of <i>Schisandra chinensis<\/i> and its major lignans on agonist-induced contraction in guinea pig ileum. <i>Phytomedicine<\/i>, <b>18<\/b>, 1153\u20131160 (2011).","DOI":"10.1016\/j.phymed.2011.06.003"},{"key":"5","doi-asserted-by":"crossref","unstructured":"5) Obara K, Kawaguchi A, Inaba R, Kawakita M, Yamaguchi R, Yamashita H, Xu K, Ou G, Yamaki F, Yoshioka K, Tanaka Y. Docosahexaenoic acid and eicosapentaenoic acid inhibit the contractile responses of the guinea pig lower gastrointestinal tract. <i>Biol. Pharm. Bull.<\/i>, <b>44<\/b>, 1129\u20131139 (2021).","DOI":"10.1248\/bpb.b21-00362"},{"key":"6","doi-asserted-by":"crossref","unstructured":"6) Obara K, Yoshioka K, Shimada A, Ichihara S, Kinami W, Makino F, Takazakura N, Enomoto M, Tanaka Y. Ferulic acid suppresses guinea pig ileal longitudinal smooth muscle contractions by inhibiting voltage-dependent Ca<sup>2+<\/sup> channels. <i>J. Pharmacol. Sci.<\/i>, <b>158<\/b>, 289\u2013293 (2025).","DOI":"10.1016\/j.jphs.2025.05.012"},{"key":"7","doi-asserted-by":"crossref","unstructured":"7) Wei Y, Yu Z, Wang L, Li X, Li N, Bai Q, Wang Y, Li R, Meng Y, Xu H, Wang X, Dong Y, Huang Z, Zhang XC, Zhao Y. Structural bases of inhibitory mechanism of Ca<sub>V<\/sub>1.2 channel inhibitors. <i>Nat. Commun.<\/i>, <b>15<\/b>, 2772 (2024).","DOI":"10.1038\/s41467-024-47116-8"},{"key":"8","unstructured":"8) The IUPHAR\/BPS Guide to PHARMACOLOGY. \u201cdiltiazem.\u201d: &lt;https:\/\/www.guidetopharmacology.org\/GRAC\/LigandDisplayForward?ligandId=2298&gt;, accessed 18 February, 2026."},{"key":"9","doi-asserted-by":"crossref","unstructured":"9) Mao S, Zhang H, Lv L, Zhu Z, Zhao L, Zhang G, Chai Y. Rapid determination and pharmacokinetics study of lignans in rat plasma after oral administration of <i>Schisandra chinensis<\/i> extract and pure deoxyschisandrin. <i>Biomed. 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