article nonhuman plant extract Plant Extracts animal experiment drug isolation unclassified drug Atoms in molecules Density functional theory Gomphrena martiana Natural bond orbital analysis controlled study female mass spectrometry mouse Antioxidants Compositae drug structure intraperitoneal drug administration male plant structure elucidation Amanita phalloides Animalia Aqueous solvent effect Argentina Leguminosae Mice Nierembergia hippomanica Plants, Medicinal