The invention relates to a compound of general formula (I)
characterized in that:
R1 is a C1-C4 alkyl group, and
R2 is an optionally substituted nitrogen, sulfur or oxygen containing heteroaromatic ring.
本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,R2是可选取的氮、
硫或含氧杂环芳香环,并且可以被取代。