Present invention provides a compound of formula, (I) [Wherein, R 1 represents a hydrogen atom or the like, R 2 is a lower alkyl group, R 4 and R 3 represents a lower alkyl group, R 5 represents a phenyl group, R 6 is a hydrogen atom and their pharmaceutically acceptable compound represented indicate like, m represents an integer of 2 to 0, p is an integer of 4 to 1, q is in] an integer from 1 to 5 relates to a salt. None [Selection Figure]本発明は、式(I)[式中、R1は水素原子等を示し、R2は低級アルキル基等を示し、R3及びR4は低級アルキル基等を示し、R5はフェニル基等を示し、R6は水素原子等を示し、mは、0乃至2の整数を示し、pは、1乃至4の整数を示し、qは、1乃至5の整数を示す]で表される化合物又はその薬学的に許容される塩に関する。【選択図】なし
