Salpichroa origanifolia article 14 unclassified drug 14 withanolide 14 Solanaceae 12 nonhuman 10 chemical structure 8 Ergosterol 6 Withanolides 6 plant leaf 6 salpichrolide c 6 spectroscopy 6 Argentina 4 Epoxy Compounds 4 Magnoliophyta 4 Natural insecticides 4 angiosperm 4 chemical analysis 4 chemistry 4 isolation and purification 4 lethality 4 mass spectrometry 4 molecular model 4 nuclear magnetic resonance spectroscopy 4 plant 4 proton nuclear magnetic resonance 4 salpichrolide a 4 salpichrolide b 4 salpichrolide g 4 stereochemistry 4