長柄千層塔（學名：Huperzia serrata），臺灣話又稱龍鱗草（Lîng-lân-tsháu）、七寸金（Tshit-tshùn-kim）、金不換（Kim-put-huàn）[1]，為石松科石杉屬下的一個種，含有石杉鹼甲這種生物鹼可以抑制乙醯膽鹼酯酶活性，作為一種號稱可益智的非處方補劑售賣。[2][3]
參考文獻
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