| 摘要 |
<p>Derivatives of the formula (I), wherein R1 represents H or a C1-C4 alkyl; X represents either an oxygen atom in which case R2=H or halogen, or a methylene group or a -CH=CH- group in which case R2=H; n has a value of 1 or 2 when X is an oxygen atom or a methylene group and a value of 0 or 1 when X represents the -CH=CH- group; R3 and R4 each independently represent H, C1-C4 alkyl, C4-C7 cycloalkyl, phenyl or benzyl; R5 represents H or C1-C4 alkyl; R6 represents C1-C4 alkyl, CHF2, CF3, C2F5, C4-C7 cycloalkyl, phenyl or benzyl; R4 and R6 may also together form a -(CH2)3- or -(CH2)4- chain; R5 and R6 may also together form a -(CH2)4- or -(CH2)5- chain; and R7 represents H, C1-C4 alkyl, C2-C5 acyl, or benzyl, which are useful as medicines.</p> |
