A pH-responsive, multiple chemotherapeutic agent derived nanocarrier has been synthesized by conjugating doxorubicin, indomethacin, and folate to the backbone of norbornene polymer. Drug molecules are connected to the norbornene backbone by an ester linker to demonstrate the pH-responsive capabilities. The complete chemical and biological properties of the new norbornene-based polymeric nanocarrier, intended for combination cancer chemotherapy, are discussed.