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ArticleCurrent medicinal chemistry2026

Morpholine-tethered Novel Hydrazones as Promising Non-peptidic Prolyl Oligopeptidase (POP) Inhibitors: Synthesis

Urwa Khalid, Noor Fatima, Saeed Ullah, Sobia Ahsan Halim, Ajmal Khan, Suraj N Mali, Attalla F El-Kott, Mohammed A AlShehri, Hamdy Kashtoh, Ahmed Al-Harrasi and 1 more

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Article in Current medicinal chemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

11 authors.

Urwa KhalidInstitute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan.
Noor FatimaInstitute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan.
Saeed UllahNatural and Medical Sciences Research Centre, University of Nizwa, P.O. Box 33, PC 616, Birkat Al Mauz, Nizwa, Sultanate of Oman.
Sobia Ahsan HalimNatural and Medical Sciences Research Centre, University of Nizwa, P.O. Box 33, PC 616, Birkat Al Mauz, Nizwa, Sultanate of Oman.
Ajmal KhanNatural and Medical Sciences Research Centre, University of Nizwa, P.O. Box 33, PC 616, Birkat Al Mauz, Nizwa, Sultanate of Oman.
Suraj N MaliDepartment of Pharmaceutical Science and Technology, Birla Institute of Technology, Mesra, 835215, India.
Attalla F El-KottDepartment of Biology, College of Science, King Khalid University, Abha, Saudi Arabia.
Mohammed A AlShehriDepartment of Biology, College of Science, King Khalid University, Abha, Saudi Arabia.
Hamdy KashtohDepartment of Biotechnology, Yeungnam University, Gyeongsan, 38541, Gyeongbuk, Republic of Korea.
Ahmed Al-HarrasiNatural and Medical Sciences Research Centre, University of Nizwa, P.O. Box 33, PC 616, Birkat Al Mauz, Nizwa, Sultanate of Oman.
Zahid ShafiqInstitute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan.

Funding

Deanship of Scientific Research at King Khalid University RGP1/15/45
6 · The paper itself

Abstract

introductionProlyl oligopeptidase (POP) is a pivotal druggable target implicated in diverse biological processes and linked to the development of various ailments, including neurodegenerative disorders. While conventional peptide-based inhibitors have been a centerpiece, their limitations, such as restricted bioavailability, necessitate exploration of non-peptidic inhibitors for their therapeutic potential.

methodsThis study focuses on designing, synthesizing, and assessing morpholine- based hydrazones targeting the catalytic serine residue of POP. The hydrazones (5a-o), reported as moderately potent analogs compared to the renowned Z-Pro-Prolinal, demonstrated in vitro POP inhibition with IC

resultsMoreover, the in vitro kinetic study of compound 5h indicated that it exhibited concentration-dependent type of inhibition. In silico docking studies of 5h revealed robust interactions in the POP enzyme's active site, yielding a docking score of -6.30 Kcal/- mol, consistent with experimental results.

conclusionAll findings underscored the potential of synthesized derivatives for drug development.

Indexed as

HydrazonesMorpholinesSerine EndopeptidasesSerine Proteinase InhibitorsHumansMolecular Docking SimulationMolecular StructureProlyl OligopeptidasesStructure-Activity RelationshipHydrazonesmorpholineMorpholinesPREPL protein, humanProlyl OligopeptidasesSerine EndopeptidasesSerine Proteinase Inhibitorsantimicrobial.hydrazonesmolecular dockingmorpholineprolyl endopeptidase (PEP)Prolyl oligopeptidase (POP)

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.