Compounds of the general formula
and pharmaceutically acceptable non-toxic acid addition salts thereof, in which L and D, when applicable, define the chirality;
R1 and R2 independently are hydrogen or C1-C3 primary alkyl;
R3 is C1-C3 primary or secondary alkyl or-CH2CH2-S-CH3;
R4 is hydrogen or C1-C3 primary alkyl;
R5 is hydrogen or C1-C3 primary alkyl;
Y is hydrogen or acetyl; and
Zis
-CH2OH, or -CN; subject to the limitation that
one of R4 and R, is C1-C3 primary alkyl and the other is hydrogen; are useful analgesic agents.
通式化合物及其药学上可接受的无毒酸加成盐,其中 L 和 D(适用时)定义手性;R1 和 R2 独立地为氢或 C1-C3 伯烷基;R3 为 C1-C3 伯烷基或仲烷基或-CH2CH2-S-
CH3;R4 为氢或 C1-C3 伯烷基;R5 为氢或 C1-C3 伯烷基;Y 为氢或乙酰基;Z 为-CH2OH 或-CN;限制条件是 R4 和 R 中的一个为 C1-C3 伯烷基,另一个为氢;是有用的镇痛剂。