title: The relation between biological activity and the degree of resolution of optical isomers.
mesh_terms: D000818:Animals; D002794:Choline / Q000494:pharmacology*; D003510:Cyclohexanes / Q000494:pharmacology; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D008333:Mandelic Acids / Q000494:pharmacology*; D009904:Optical Rotation; D011950:Receptors, Cholinergic; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014282:Trihexyphenidyl / Q000494:pharmacology*
chemical_list: D003510:Cyclohexanes; D008333:Mandelic Acids; D011950:Receptors, Cholinergic; D014282:Trihexyphenidyl; D002794:Choline