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, prodrug, or pharmaceutically acceptable salt thereof, wherein A, B, C, L<;sub>;1<;/sub>;, L<;sub>;2<;/sub>;, R<;sub>;1<;/sub>;, R<;sub>;2<;/sub>;, R<;sub>;3<;/sub>;, R<;sub>;4<;/sub>;, R<;sub>;s<;/sub>;, w, x, y and z are as defined herein. Methods for treating diseases/disorders by antagonizing muscarinic receptors, including specifically antagonizing muscarinic receptor 4 (M4), are also provided.