Meteloxetin (1), a new phenolic amino-oxetane, and eight known new source phenols (2–9) have been bioassay-directed isolated from methanolic extract of Datura metel Linn. Their structures were elucidated through modern spectroscopic data. The plant extract showed the significant inhibition potential against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), and its dichloromethane (DCM) fraction exhibited the remarkable inhibition potentials against AChE with IC₅₀ (inhibition concentration) value 1.32 ± 0.02 µg/ml and BChE with IC₅₀ value 1.13 ± 0.01 µg/ml, when compared with the standard drug eserine (AChE, IC₅₀ 0.04 ± 0.01 µg/ml) and galanthamine (BChE, IC₅₀ 0.92 ± 0.01 µg/ml). The bioactive DCM fraction was subjected to systematic isolation protocol to isolate the 1–9 compounds, and all were subjected to evaluate their AChE and BChE inhibition potentials. From these isolates, compound 1 showed the effective inhibition potential against BChE with IC₅₀ value 0.84 ± 0.03 µg/ml and excellent inhibition potential against AChE with IC₅₀ value 0.07 ± 0.02 µg/ml. This strong inhibition potential of 1 is due to the presence of amino-oxetane groups in it. The in silico studies indicate that oxetane rings contain high-energy oxygen, which makes it a marvelous pharmacophore with diverse biological potentials. The potent nature of compound 1 has also been evaluated by exploring its electronic properties, molecular electrostatic potential and Hirshfeld analysis by density functional theory.

梅洛西汀（1），一种新的酚类氨基-氧杂环丁烷和八种已知的新来源苯酚（2–9）已通过生物测定法从曼陀罗梅图林的甲醇提取物中分离出来。通过现代光谱数据阐明了它们的结构。所述植物提取物显示出对乙酰胆碱酯酶的显著抑制潜在胆碱酯酶（AChE）和丁酰胆碱酯酶（BChE的），并且它的二氯甲烷（DCM）分数表现出对乙酰胆碱酯酶的显着抑制电位与IC ₅₀（抑制浓度）值1.32±0.02微克/毫升及的BChE与与标准药物色氨酸（AChE，IC ₅₀ 0.04±0.01 µg / ml）和加兰他敏（BChE，IC）相比，IC ₅₀值为1.13±0.01 µg / ml₅₀ 0.92±0.01 µg / ml）。对具有生物活性的DCM馏分进行系统分离，以分离出1–9种化合物，并对所有化合物进行AChE和BChE抑制潜力的评估。从这些分离物中，化合物1显示出对BChE的有效抑制潜能，IC ₅₀值为0.84±0.03 µg / ml，并且对AChE的显示出优异的抑制潜能，IC ₅₀值为0.07±0.02 µg / ml。1的强大抑制潜力是由于其中存在氨基氧杂环丁烷基。电脑研究表明，氧杂环丁烷环含有高能氧，这使其成为具有多种生物潜能的奇妙药效基团。化合物1的强力性质 还通过探索其电子性质，分子静电势和密度泛函理论进行的赫希菲尔德分析，对其进行了评估。