2,2-bis-[4-(3,4-Dicarboxyphenoxy) phenyl] propane dianhydride

2,2-bis [4-(3,4dicarboxyphenoxy) phenyl] propane dianhydride(bpa ; 4,4'-(4,4'-isopropylidenediphenoxy)bis(phthalic anhydride) ; isopropylidenediphenoxy)bis-(phthalic anhydride) (bpada) ; bpada ; 4,4'-(4,4'-isopropylidenediphenoxy)bis-(phthalic ; 4,4'-(4,4'-isopropylidenediphenoxy)diphthalic anhydride ; 4,4'-bisphenol a dianhydride ; ultem dianhydride ; 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride ; 4,4'-[(isopropylidene)bis(p-phenyleneoxy)]diphthalic dianhydride