A compound represented by general formula (I): ##STR1## wherein R.sub.1 and R.sub.2, each presents an ethyl group and R.sub.3 represents an alkoxy group having (1) to (7) carbon atoms which may be substituted by one or more substituents selected from a hydroxyl group, a halogen atom, a cyano group, an alkoxy group having (1) to (4) carbon atoms, an amino group and an acylamino group with the proviso that R.sub.1 and R.sub.2 are not a methyl group simultaneously, is disclosed. The compound according to the present invention is useful as a pharmaceutical.
本发明揭示了一种通式(I)所表示的化合物:##STR1##其中R.sub.1和R.sub.2,分别表示乙基基团,R.sub.3表示具有(1)至(7)个碳原子的烷氧基团,该基团可以被一个或多个取代基所取代,所述取代基包括羟基、卤素原子、
氰基、具有(1)至(4)个碳原子的烷氧基团、
氨基和酰胺基,但前提是R.sub.1和R.sub.2不同时为甲基基团。本发明的化合物可用作药物。