Phthalicanhydride, 3,6-difluoro- (7CI,8CI);3,6-Difluorophthalic anhydride;4,7-Difluoroisobenzofuran-1,3-dione;4,7-Difluoro-1,3-isobenzofurandione;5,8-Difluoro-1,3-isobenzofurandione;
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