LY367385 hydrochloride is a potent and selective mGluR1a antagonist with an IC50 value of 8.8 μM for inhibiting quisqualate-induced phosphoinositide (PI) hydrolysis, showing significantly higher selectivity compared to its >100 μM IC50 value for mGlu5a. This compound exhibits neuroprotective, anticonvulsant, and antiepileptic effects [1] [2].