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Development of a specific fragment pattern-based quadrupole-Orbitrap mass spectrometry method to screen adulterated products of phosphodiesterase-5 inhibitors and their analogues

Combinatorial ChemistryMedicinal ChemistryPhosphodiesterase-5 InhibitorsAdulterated ProductsBiochemistryMedicineNatural SciencesMass SpectrometryRational Drug DesignDrug DevelopmentPharmacologyDrug DiscoveryDrug Analysis