The invention relates to a compound of general formula (I)
characterized in that:
R
1
is a C
1
-C
4
alkyl group, and
R
2
is an optionally substituted nitrogen, sulfur or oxygen containing heteroaromatic ring.
这项发明涉及一种一般式(I)的化合物,其特征在于:R1是C1-C4烷基基团,而R2是一个可选择取代的含氮、
硫或氧的杂芳环。