| 摘要 |
<p>Compounds represented by general formula (I), wherein R1 is an aryl radical having from 4 to 14 carbon atoms; R2 is selected from the group consisting of hydrogen, lower alkyl and phenyl radicals; A is O, S or N; m is 1 to 3; n is 1 to 3; x is 0 or 1 and y is 1 when A is O or S and y is 2 when A is N, their use as melatonin antagonists, and preparation.</p> |
