| abstract |
The present invention provides a novel compound having a superior calcium antagonism, in particular, a neuron-selective calcium antagonism. Namely, it provides a compound represented by the following formula (I), a salt thereof or a hydrate of them: nwherein Ar is a thiophene or benzene ring which may be substituted,the ring A is a piperazine ring, homopiperazine ring or piperidine ring which may be substituted, the ring B is a C 6-14 aromatic hydrocarbon ring or 5- to 14-membered aromatic heterocyclic ring which may be substituted, the partial structure -D 1 -E-D 2 - is a C 1-4 alkylene group, W 1 and W 2 are the same as or different from each other and each represents (1) a single bond or (2) a C 1-6 alkylene chain which may be substituted, X is (1) an oxygen atom, a group represented by (2) the formula -NR 2 - (wherein R 2 indicates a hydrogen atom, or a C 1-6 alkyl group, a C 3-8 cycloalkyl group, a lower acyl group or a C 1-6 alkylsulfonyl group which may be substituted) or (3) -NH-SO 2 -, R 1 is a methyl group, an ethyl group, a n-propyl group or an isopropyl group. |