The present invention provides a novel bicyclic or tricyclic heterocyclic compound represented by the formula (I)
wherein ring A is an optionally substituted aromatic group,
one of X1 and X2 is a carbon atom, and the other is a nitrogen atom,
X3 is a nitrogen atom, or CR2,
X4 is a nitrogen atom, or CR3,
X5 is a sulfur atom, or -CH=CH-,
Z1 is an oxygen atom, -C(R6)(R7)-, -NH-, -C(R6)(R7)-NH-,-NH-C(R6)(R7)-, -C(R6)(R7)-O-, -O-C(R6)(R7)-, or a single bond,
one of Z2 and Z3 is CH and the other is a nitrogen atom, or both are nitrogen atoms,
and other symbols are as defined in the DESCRIPTION, or a pharmacologically acceptable salt thereof.
The present invention provides a novel bicyclic or tricyclic heterocyclic compound represented by the formula (I)
wherein ring A is an optionally substituted aromatic group,
one of X1 and X2 is a carbon atom, and the other is a nitrogen atom,
X3 is a nitrogen atom, or CR2,
X4 is a nitrogen atom, or CR3,
X5 is a sulfur atom, or —CH═CH—,
Z1 is an oxygen atom, —C(R6)(R7)—, —NH—, —C(R6)(R7)—NH—, —NH—C(R6)(R7)—, —C(R6)(R7)—O—, —O—C(R6)(R7)—, or a single bond,
one of Z2 and Z3 is CH and the other is a nitrogen atom, or both are nitrogen atoms,
and other symbols are as defined in the DESCRIPTION, or a pharmacologically acceptable salt thereof.