Tetrachlorophthalic anhydride117-08-844 % similar Tetrabromophthalic anhydride632-79-144 % similar Tetrafluorophthalic anhydride652-12-044 % similar 3-Iodophthalic anhydride28418-88-442 % similar 3,6-Dichlorophthalic anhydride4466-59-541 % similar 3-Methylphthalic anhydride4792-30-738 % similar Naphthalenetetracarboxylic dianhydride81-30-135 % similar Phthalic anhydride85-44-935 % similar 3-Chlorophthalic anhydride117-21-534 % similar 3-Hydroxyphthalic anhydride37418-88-533 % similar Furo[3,4-B]pyrazine-5,7-dione4744-50-733 % similar 3-Fluorophthalic anhydride652-39-133 % similar 4-Methylphthalic anhydride19438-61-031 % similar 4,5-Dichlorophthalic anhydride942-06-331 % similar 2-Methyl-6-nitrobenzoic anhydride434935-69-031 % similar Perylenetetracarboxylic dianhydride128-69-830 % similar Bpda2420-87-330 % similar 2,3-Naphthalenedicarboxylic anhydride716-39-230 % similar