Novel polycyclic ethyl alkylamides of formula I are active as melatonergic agents. ##STR1## wherein Z=CH (when a double bond is present) or (CH.sub.2).sub.n, wherein n is 1-4; X=O, CH.sub.2, or CH (when a double bond is present); R=C.sub.1-6 alkyl, C.sub.3-6 cycloalkyl, or C.sub.1-3 haloalkyl, C.sub.2-6 alkenyl, C.sub.2-4 alkoxyalkyl, C.sub.1-4 trifluoromethylalkyl, C.sub.1-6 aminoalkyl; and Y=H, C.sub.1-6 alkoxy or halogen.
式I中的新型多环乙基烷基酰胺具有
褪黑素作用。其中,Z = CH(当存在双键时)或(
CH2)n,其中n为1-4; X = O, 或CH(当存在双键时); R = C1-6烷基,C3-6环烷基或C1-3卤代烷基,C2-6烯基,C2-4烷氧基烷基,C1-4三
氟甲基烷基,C1-6
氨基烷基; 而Y = H,C1-6烷氧基或卤素。