title: Synthesis and neuromuscular blocking activity of 16beta-N-methylpiperazino steroidal derivatives.
abstract: Steroidal quaternary ammonium compounds 12 and 13 with quaternised nitrogen at positions 3 and 16 of the steroidal nucleus in androstane series were synthesised and their neuromuscular blocking activities and ganglion blocking activities were studied using chick biventer and anaesthetised cat as the models. The bisquaternary compounds 12 and 13 have been found to be greater in potency than D-tubocurarine. Acetoxy derivative 13 has been found to be more potent than pipecuronium bromide taking D-tubocurarine as the standard compound indicating the need of acetoxy function at position 16.
authors.affiliation: University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh 160 014, India.
authors.forename: Dharam Paul
authors.initials: DP
authors.lastname: Jindal
authors.forename: Poonam
authors.initials: P
authors.lastname: Piplani
authors.forename: H
authors.initials: H
authors.lastname: Fajrak
authors.forename: C
authors.initials: C
authors.lastname: Prior
authors.forename: Ian G
authors.initials: IG
authors.lastname: Marshall
mesh_terms: D000818:Animals; D002415:Cats; D002645:Chickens; D005724:Ganglia / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects; D009119:Muscle Contraction / Q000187:drug effects; D009466:Neuromuscular Blocking Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D000644:Quaternary Ammonium Compounds / Q000138:chemical synthesis / Q000494:pharmacology; D013256:Steroids / Q000138:chemical synthesis* / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D009466:Neuromuscular Blocking Agents; D000644:Quaternary Ammonium Compounds; D013256:Steroids