The compound according to claim 9, wherein R1 is a lower alkyl group, R2 is a lower alkyl group which may be substituted with an optionally substituted cyclic amino group, a halogen atom or a hydroxy, R3 is hydrogen atom or an optionally substituted phenyl group, R4 and R5 are a lower alkyl group, and A ring is a non-aromatic 5-membered nitrogen-containing heterocyclic ring which may be further su