Wherein n is an integer of from 0 to 3; R
1A
is a 5-membered aromatic heterocyclic group containing at least one oxygen atom; R
2A
is —COR
8
(wherein R
8
is aryl); R
3A
is hydrogen or lower alkyl; and R
12
represents cycloalkyl, aryl, aralkyl, alicyclic heterocyclic group, aromatic heterocyclic group, alicyclic hetocyclic-alkyl, or aromatic heterocyclic-alkyl, and R
1A
, R
2A
, R
3A
and R
12
are individually optionally substituted.