1,3-Bis(4-carboxyphenoxy)propane 1,3-Bis(p-carboxyphenoxy)propane 1,3-Bis-cpp 3753-81-9 4,4'-(1,3-Propanediylbis(oxy))bis-benzoic acid 4,4'-(Trimethylenedioxy)di-benzoic acid Benzoic acid, 4,4'-(1,3-propanediylbis(oxy))bis- Cpp-bis