| abstract |
The invention relates to novel piperazine derivatives having the formula (I), <IMAGE> (I) wherein R1 represents a C1-5 alkyl group having optionally a phenyl, trimethoxyphenyl, phenoxy, methoxy-cyclohexyl or heptamethyleneimino substituent on the terminal carbon atom, allyl group, a phenyl group having optionally one or more halogen, C1-4 alkyl, C1-4 alkoxy, trihalomethyl or allyl substituent(s), or a C2-5 alkoxycarbonyl group, R2 represents hydrogen or a C1-4 alkyl group, and R3 represents furyl group, 9-xanthenyl group or a C5-6 cycloalkyl group having a C1-4 alkoxy substituent, OR ACID ADDITION SALTS OR QUATERNARY SALTS THEREOF. |