title: Inversion of stereospecificity by methylation of compounds acting at acetylcholine receptors.
mesh_terms: D000109:Acetylcholine / Q000502:physiology*; D000818:Animals; D001001:Anura; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D008745:Methylation; D008968:Molecular Conformation; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009132:Muscles / Q000187:drug effects; D011812:Quinuclidines / Q000494:pharmacology*; D011896:Rana temporaria; D011950:Receptors, Cholinergic / Q000187:drug effects*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: D011812:Quinuclidines; D011950:Receptors, Cholinergic; D000109:Acetylcholine