wherein n is an integer of 0 to 10; R
1
represents substituted or unsubstituted lower alkyl, substituted or unsubstituted lower alkoxy, substituted or unsubstituted cycloalkyl, substituted or unsubstituted lower alkoxycarbonyl, substituted or unsubstituted heterocyclic-alkyl, substituted or unsubstituted aryl, —CONR
7
R
8
, —NR
9
R
10
, etc.; R
2
represents substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group, etc.; R
3
and R
5
may be the same or different, each represent a hydrogen atom, substituted or unsubstituted lower alkyl, etc.; R
4
and R
6
may be the same or different, each represent a hydrogen atom, halogen, substituted or unsubstituted lower alkyl, etc.)
Provided are an Hsp90 family protein inhibitor comprising, as an active ingredient, a benzene derivative of formula (I) or a prodrug thereof or a pharmaceutically-acceptable salt thereof, etc.
(wherein n is an integer of 0 to 10; R1 represents substituted or unsubstituted lower alkyl, substituted or unsubstituted lower alkoxy, substituted or unsubstituted cycloalkyl, substituted or unsubstituted lower alkoxycarbonyl, substituted or unsubstituted heterocyclic-alkyl, substituted or unsubstituted aryl, -CONR7R8, -NR9R10, etc.; R2 represents substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group, etc.; R3 and R5 may be the same or different, each represent a hydrogen atom, substituted or unsubstituted lower alkyl, etc.; R4 and R6 may be the same or different, each represent a hydrogen atom, halogen, substituted or unsubstituted lower alkyl, etc.)
Provided are an Hsp90 family protein inhibitor comprising, as an active ingredient, a benzene derivative of formula (I) or a prodrug thereof or a pharmaceutically-acceptable salt thereof, etc.