Steppogenin-7,4'-di-O-β-D-glucoside is a natural product that can be isolated from the roots of Morus nigra.

D-proline is an isomer of the naturally occurring amino acid L-Proline. D-amino acids have been found in relatively high abundance in human plasma and saliva. These amino acids may be of bacterial origin but there is also evidence that they are endogenously produced through amino acid racemase activity.

5-Bromo-1H-Indole-3-Carboxylic Acid Methyl Ester is a marine derived natural products found in Smenospongia sp.