CTEP is a compound chemically derived from basimglurant and optimized for utility in rodent studies. CTEP is the first reported mGlu5 inhibitor with both, very long half-life and high oral bioavailability in rodents, classifying as useful pharmacological tool for long-term treatment. CTEP is significantly active in treatment of anxiety in rat and mouse. Chronic treatment with CTEP in a mouse model of Fragile X rescued learning and memory deficits, elevated locomotor activity and increased spine density, suggesting that this treatment may be effective in correcting multiple neurological symptoms. CTEP was able to improve various behavioral alterations induced by chronic social defeat stress.