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A series of heterocyclic analogues 2-5 related to naltrindole (1) (NTI) and 6-arylnaltrexone derivatives 6-8 were synthesized in order to determine the role of the spacer and the address moieties in conferring delta opioid receptor antagonist activity. The benzofuran (NTB), quinoxaline, and quinoline analogues (2, 3, and 4, respectively) were(More)
Computer-aided model building techniques have been used to construct three-dimensional model structures for hamster beta 2 adrenergic receptor. Experimental data were used as constraints to guide the model building procedure, and a number of rather strict criteria were applied to assess the physical plausibility of model structures. We present details of(More)
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