5-hydroxy-3-[(4-hydroxyphenyl)methylidene]-benzo[b]furan-2-one

5-hydroxy-3-[(4-hydroxyphenyl)methylidene]-1-benzofuran-2-one

对羟基苯甲醇

[4-(oxan-2-yloxy)phenyl]methanol

1,5-二对羟苯基-1,4-戊二烯-3-酮