The compound according to the present invention is a compound represented by the following chemical formula:
wherein, in the above-described chemical formula, R
1
is oxygen or sulfur, and R
2
to R
6
are each independently selected from hydrogen, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an acyl group having 1 to 6 carbon atoms and a nitro group.
根据本发明,该化合物由以下
化学式表示:其中,在上述
化学式中,R1为氧或
硫,R2至R6分别独立地选择自氢、具有1至6个碳原子的烷基基团、具有1至6个碳原子的烷氧基团、具有1至6个碳原子的酰基团和硝基团。