A potent, selective opioid receptor agonist or antagonist exhibiting properties useful for a long-acting analgesic or opiate abuse treatment agent or appetite suppressant having the general formula: ##STR1## wherein R is methyl, cyclopropylmethyl or allyl, and R.sub.1 is an unsubstituted or substituted aryl, aralkyl, heteroaryl, heteroaralkyl or a cycloalkyl group with or without a heteroatom like S,O,N; and the pharmaceutically acceptable salts thereof.
一种强效、选择性的阿片受体激动剂或拮抗剂,具有用于长效止痛剂、阿片类药物滥用治疗剂或食欲
抑制剂的特性,其一般公式为:##STR1## 其中R为甲基、环丙甲基或烯丙基,R.sub.1为未取代或取代的芳基、芳基烷基、杂芳基、杂芳基烷基或环烷基,带或不带类似S、O、N的杂原子;以及其药学上可接受的盐。