The present invention relates to a compound that has URAT1 inhibitory action, and a URAT1 inhibitor, a blood uric acid level-reducing agent and a pharmaceutical composition comprising the compound. More specifically, the present invention relates to a compound represented by Formula (I) below.
[in the formula,
R
1
is -Q
1
-A
1
and the like;
is a double bond or a single bond; when
is a double bond, W
1
is a nitrogen atom or a group represented by the general formula: ═C(R
a
)—, and W
2
is a nitrogen atom or a group represented by the general formula: ═C(R
b
)—; when
is a single bond, W
1
is a group represented by the general formula: —C(R
aa
)(R
ab
)— or a group represented by the general formula: —(C═O)—, and W
2
is a group represented by the general formula: —C(R
ba
)(R
bb
)—, a group represented by the general formula: —(C═O)— or a group represented by the general formula: —N(R
bc
)—; W
3
, W
4
and W
5
are each independently a nitrogen atom or a methine group and the like that may have a substituent; X is a single bond, an oxygen atom and the like; Y is a single bond or (CR
Yi
R
Yi′
)
n
; and Z is a hydroxyl group or COOR
2
and the like.