Siplizumab (MEDI-507) is a humanized IgG1 monoclonal antibody that targets CD2, selectively depleting effector memory T cells and promoting the relative expansion of alloreactive regulatory T cells in vitro. Siplizumab can be used to treat plaque psoriasis.

Dihydrosamidin is a natural product. It inhibiting effect on triacylglycerol accumulation in 3T3-L1 preadipocytes.

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.