The affinity and efficacy of onium salts on the frog rectus abdominis.
D000109:Acetylcholine / Q000037:antagonists & inhibitors*; D000818:Animals; D001001:Anura; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects*; D011726:Pyridinium Compounds / Q000494:pharmacology*; D011759:Pyrrolidines / Q000494:pharmacology*; D011812:Quinuclidines / Q000494:pharmacology*; D013757:Tetraethylammonium Compounds / Q000494:pharmacology*
D011726:Pyridinium Compounds; D011759:Pyrrolidines; D011812:Quinuclidines; D013757:Tetraethylammonium Compounds; D000109:Acetylcholine