targeting the proton-coupled folate transporter for selective delivery of 6-substituted pyrrolo[2,3-d]pyrimidine antifolate inhibitors of de which novo purine biosynthesis in the chemotherapy of sol..

targeting the proton-coupled folate transporter for selective delivery of 6-substituted pyrrolo[2,3-d]pyrimidine antifolate inhibitors of de which novo purine biosynthesis in the chemotherapy of solid tumors