ethyl 2-bromo-2-(3-oxo-4H-quinoxalin-2-yl)acetate

N-(2-aminophenyl)furo[3,2-b]quinoxaline-3-carboxamide

3-(N-2-hydroxyphenylcarbamoyl)furo[2,3-b]quinoxaline

1,4-二氧六环