tetraethyl benzene-1,2,4,5-tetracarboxylate

3,3'',6,6''-tetrahydroxydispiro[xanthene-9,1'-benzo[1,2-c:4,5-c']difuran-5',9''-xanthene]-3',7'-dione

5,6-二羧基荧光素

1,2,4,5-chtcH4

N,N'-二羟基均苯四酸亚胺