SuraminPurinergic P2 Receptor AntagonistsReceptors, Purinergic P2Drug Administration SchedulePyridoxal PhosphateUridine TriphosphateAdenosine TriphosphateReceptors, PurinergicPurinergic AntagonistsAntineoplastic Combined Chemotherapy ProtocolsTreatment OutcomePurinergic P2 Receptor AgonistsDrug Therapy, CombinationReceptors, Purinergic P2XPurinergic P2X Receptor AntagonistsDose-Response Relationship, DrugAntineoplastic AgentsTrypanocidal Agents