To provide compounds useful as preventives or remedies for circulatorydiseases, nervousdiseases, metabolic diseases, reproductive system diseases, and digestivediseases. [MEANSFOR SOLVING PROBLEMS]Compounds represented by the general formula (I) or pharmaceuticallyacceptable salts thereof:(see formula I)wherein R1 is C1-6 alkyl, C3-8 cycloalkyl, or the like； R2 is phenyl,heteroaryl, or the like； Q isN or CH； and M1, M2, M3 and M4 are each independently hydrogen or C1-6 alkyl,oralternatively M1 together with M2 or M3 forms -CH2-CH2- or the like, or M4together with M2or M3 forms -CH2-CH2- or the like, with the proviso that M1, M2, M3, and M4are such thatone -CH2- or -CH2-CH2- group is formed thereamong.
