nonhuman drug isolation 174 unclassified drug 132 article 130 controlled study 80 drug structure 78 Animals 48 proton nuclear magnetic resonance 40 priority journal 38 plant extract 36 antiviral activity 34 carbon nuclear magnetic resonance 34 Molecular Structure 32 structure analysis 28 animal cell 26 human 26 Argentina 24 antifungal activity 24 drug cytotoxicity 24 mass spectrometry 24 nuclear magnetic resonance 24 phytochemistry 24 Humans 22 cytotoxicity 22 human cell 22 drug identification 20 drug screening 20 in vitro study 20 Antiviral Agents 18 Fungi 18