Synthesis and analgesic effects of N-[3-[(hydroxyamino)carbonyl]-1-oxo-2(R)-benzylpropyl]-L-isoleucyl-L-leucine, a new potent inhibitor of multiple neurotensin/neuromedin N degrading enzymes
and NN from slices of mice hypothalamus depolarized with potassium. In various assays commonly used to select analgesics, e.g. hot-plate test, tail-flick test, acetic acid-induced writhing test, in mice, compound 6a proved to be potent when intracerebroventricularly (icv) injected. The analgesic effects observed were totally (hot-plate test) or largely (tail-flick test) reversed by the opioid antagonist