- (2Z,2′Z)-4,4′-[1,3-Phenylenebis(oxy-4,1-phenyleneimino)]bis[4-oxo-2-butenoic acid,≥98% (HPLC), 10mg
- (2Z,2′Z)-4,4′-[1,3-Phenylenebis(oxy-4,1-phenyleneimino)]bis[4-oxo-2-butenoic acid,≥98% (HPLC), 25mg