N-(7-Methoxy-4-quinolinyl)-N'-[6-(trifluoromethyl)-2-pyridinyl]urea is a neuroprotective agent and a glycogen synthase kinase-3 (GSK-3) inhibitor. GSK-3 is a conserved signaling enzyme that regulates a wide range of biological events (apoptosis, synaptic plasticity, axon formation, and neurogenesis). The enzyme has a conserved catalytic domain for binding ATP and a C-terminal domain with a conserved activation loop for the kinase activity. GSK-3 is a therapeutic target for treating neurodegenerative and psychiatric disorders.