<prompt> Prodrug isLevodopaAmitryptilinePrimidoneDigitoxin  <response>: Levodopa 20-KDT 23-24-KDT 6thPRODRUGACTIVE-FORMLevodopaDopamineEnalaprilEnalaprilata-methyldopaa methylnorepinephrineDipivefrineEpinephrineSulindacSulfide metaboliteHydrazide MAO inhibitorsHydrazine derivativesProguanilProguanil triazine PRODRUGACTIVE-FORMPrednisonePrednisoloneBecampicillinAmpicillinSulfasalazine5-Aminosalicyclic acidCyclophosphamideAldophosphamide, phosphoramide mustard, acroleinFluorouracilFluorouridine monophosphateMercaptopurineMethyl mercaptopurine ribonucleotide 