C-Alkylated spiro[benzofuran-3(2H),4′-1′-methyl-piperidine-7-ols] as potent opioids: A conformation-activity study

C-Alkylated spiro[benzofuran-3(2H),4′-1′-methyl-piperidine-7-ols] as potent opioids: A conformation-activity study Elucidation of the Bioactive Conformation of the N-Substituted trans-3,4-Dimethyl-4-(3-hydroxyphenyl)piperidine Class of μ-Opioid Receptor Antagonists The xanthene-9-spiro-4'-piperidine nucleus as a probe for opiate activity Phenylmorphans and analogs: opioid receptor subtype selectivity and effect of conformation on activity Effects of addition of a 2-methyl group to ethyl nipecotates (.beta.-meperidines) on receptor affinities and opiate agonist/antagonist activities N-methylnalorphine: definition of N-allyl conformation for antagonism at the opiate receptor 2-(3,4-Dichlorophenyl)-N-methyl-N-[2-(1-pyrrolidinyl)-1-substituted-ethyl]-acetamides: the use of conformational analysis in the development of a novel series of potent opioid .kappa. agonists trans -3,4-Dimethyl-4-(3-carboxamidophenyl)piperidines: A novel class of μ-Selective opioid antagonists Probes for Narcotic Receptor Mediated Phenomena. 39. Enantiomeric N-Substituted Benzofuro[2,3-c]pyridin-6-ols: Synthesis and Topological Relationship to Oxide-Bridged Phenylmorphans (2S)-1-(Arylacetyl)-2-(aminomethyl)piperidine derivatives: novel, highly selective .kappa. opioid analgesics