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LY-344,545 structure.png
PubChem CID
Chemical and physical data
Formula C20H19NO5
Molar mass 353.37 g/mol
3D model (JSmol)

LY-344,545 is a research drug developed by the pharmaceutical company Eli Lilly, which acts as an antagonist for the metabotropic glutamate receptor subtype mGluR5. It is an epimer of another metabotropic glutamate receptor antagonist, the mGluR2/3-selective LY-341,495.[1][2]


  1. ^ Ornstein PL, Bleisch TJ, Arnold MB, Kennedy JH, Wright RA, Johnson BG, Tizzano JP, Helton DR, Kallman MJ, Schoepp DD, Hérin M. 2-substituted (2SR)-2-amino-2-((1SR,2SR)-2-carboxycycloprop-1-yl)glycines as potent and selective antagonists of group II metabotropic glutamate receptors. 2. Effects of aromatic substitution, pharmacological characterization, and bioavailability. Journal of Medicinal Chemistry. 1998 Jan 29;41(3):358-78. PMID 9464367
  2. ^ Doherty AJ, Palmer MJ, Bortolotto ZA, Hargreaves A, Kingston AE, Ornstein PL, Schoepp DD, Lodge D, Collingridge GL. A novel, competitive mGlu(5) receptor antagonist (LY344545) blocks DHPG-induced potentiation of NMDA responses but not the induction of LTP in rat hippocampal slices. British Journal of Pharmacology. 2000 Sep;131(2):239-44. PMID 10991916