5-amino-4-hydroxy-2-(2-methoxyphenyl)furan-3-one

5'-amino-4'-hydroxyspiro[1H-indole-3,2'-furan]-2,3'-dione

6-乙氧基喹喔啉

6,7-喹喔啉二胺

5-amino-4-hydroxy-2-(4-methylphenyl)furan-3-one