A method of treating cancer by administering a therapeutically effective amount of a compound represented by the following Formula (I), or salt, hydrate, or solvate thereof: wherein: n represents a number from 3 to 7; m represents a number from 1 to 2; R1 and R2 independently represent a hydrogen atom or are a substituted or unsubstituted, branched or unbranched or cyclic, alkyl provided that the total number of carbon atoms represented by R1 and R2 when taken together is no less than 5 and no greater than 10; or R1 and R2 together independently represent a cyclic alkyl group having no less than 3 or no more than 7 carbon atoms; R3 and R4 independently represent a hydrogen atom or a saturated or unsaturated, substituted or unsubstituted, branched or unbranched or cyclic, hydrocarbyl radical.