A compound represented by the formula (I)wherein ring A is a 5- to 8-membered ring optionally having further
substituent(s) other than R6, R7 and R8,R1 is an
electron-withdrawing group,R2, R3, R4 and R5 are each independently a
hydrogen atom, a
halogen atom, a group bonded via a
carbon atom, a group bonded via a
nitrogen atom, a group bonded via an
oxygen atom or a group bonded via a
sulfur atom,R6 is a
halogen atom, a group bonded via a
carbon atom, a group bonded via a
nitrogen atom, a group bonded via an
oxygen atom or a group bonded via a
sulfur atom,R7 is a cyano group, a nitro group, an
acyl group optionally having
substituent(s), an optionally esterified or amidated carboxyl group or a
hydrocarbon group optionally having
substituent(s), or R6 and R7 optionally form, together with the
carbon atom bonded thereto, a ring optionally having substituent(s), andR8 is a
hydrogen atom, a
halogen atom, a group bonded via a carbon atom, a group bonded via a
nitrogen atom, a group bonded via an
oxygen atom or a group bonded via a
sulfur atom, or a salt thereof has a superior action as an
androgen receptor modulator, and is useful for the prophylaxis or treatment of hypogonadism, male
climacteric disorder, frailty,
cachexia,
osteoporosis and the like.