2, 4a, 5, 6, 7, 7a-hexahydro-4-(3-hydroxyphenyl)-l-methyl-1H-pyrindine] follows from analogy and NMR data. Compounds 3 and 4 are opioid antagonists of about the potency of nalorphine in the tail-flick vs. morphine assay and precipitate a complete abstinence syndrome in morphine-dependent monkeys. Both are nearly devoid of antinociceptive activity and they have about 0.025 times the affinity of nalorphine for the p opioid receptor. ...