Benzoic anhydride93-97-033 % similar 1,2-Naphthalenedicarboxylic anhydride5343-99-732 % similar 4,5-Difluorophthalic anhydride18959-30-331 % similar 4,5-Dichlorophthalic anhydride942-06-331 % similar 4-Bromo-1,8-naphthalic anhydride81-86-731 % similar Decabromodiphenyl ether1163-19-530 % similar Perylenetetracarboxylic dianhydride128-69-830 % similar 5,5'-Bi-2-benzofuran-1,1',3,3'-tetrone2420-87-330 % similar 2,3-Naphthalenedicarboxylic anhydride716-39-230 % similar