SEARCH Articles Figures Tables 7,8-Dihydrofolate Dihydrofolate inhibition Dihydrofolate reductase Dihydrofolate reductase drugs that inhibit Dihydrofolate reductase inhibition proguanil Dihydrofolate reductase inhibition pyrimethamine Dihydrofolate reductase inhibition sulphonamides Dihydrofolate reductase inhibitors QSAR studies of inhibition