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.

Hoechst 33258 analog 3 is part of a family of blue fluorescent dyes used to stain DNA.

Usaramine demonstrates phytotoxicity against Lactuca sativa var. Carrascoy (lettuce) assessed as inhibition of seed germination at 50 ug/cm2 after 24 hr.