Tectorigenin 7-O-xylosylglucoside is a natural product.

Concizumab is an anti-TFPI monoclonal antibody (IgG4 type) that selectively binds to the Kunitz protease inhibitor (KPI) 2 domain of TFPI, blocking its interaction with the FXa active site.

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.