Patent ID: 7781485

Claim:
A method for inhibiting heat shock protein 90 family protein comprising administering, to a patient in need thereof, an effective amount of a compound represented by Formula (I): (wherein n represents an integer of 0 to 2; R 1 represents a hydrogen atom, hydroxy, substituted or unsubstituted lower alkoxycarbonyl, or —OR 13 (wherein R 13 represents substituted or unsubstituted lower alkyl, or substituted or unsubstituted aralkyl; R 2 represents —NR 14 R 15 (wherein R 14 and R 15 may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl, or substituted or unsubstituted heterocyclic alkyl, or R 14 and R 15 are combined together with the adjacent nitrogen atom thereto to form a substituted or unsubstituted heterocyclic group) or —OR 16 (wherein R 16 represents substituted or unsubstituted lower alkyl); R 3 , R 4 and R 5 each represents a hydrogen atom; and R 6 represents a hydrogen atom, halogen, or substituted or unsubstituted lower alkyl, or a pharmaceutically acceptable salt thereof.