| 摘要 |
Morpholine derivatives of the formula <IMAGE> (I) and their pharmaceutically acceptable acid addition salts[wherein R1 represents lower alkyl. R2 represents hydrogen, lower alkyl, benzyl, lower alkoxymethyl or an acyl group; R3 represents hydrogen, lower alkyl or phenyl; R4, R5 and R6 are independently hydrogen or lower alkyl and R7 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, aryl(lower)alkyl, tetrahydrofurylmethyl or cycloalkylmethyl] possess analgesic and/or opiate antagonistic activity. |
