N-(2-(1 -benzylpiperidin-4-yl)ethyl)-4-(pyrazin-2-yl)-piperazine-1 -carboxamide derivatives and related compounds as muscarinic receptor 4 (M4) antagonists for treating neurological diseases
Provided herein are small molecule compounds of the following formula (I): or a stereoisomer, tautomer, solvate, ester or pharmaceutically acceptable salt thereof, wherein A, B, C, L