Cimicifugoside a triterpenoid isolated from Cimicifuga simplex is a novel specific nucleoside transport inhibitor. It also shows immunosuppressive activity.

Diaminopimelic acid or DAPA is a lysine-like amino acid derivative that is a key component of the bacterial cell wall. DAPA is incorporated or integrated into peptidoglycan of gram negative bacteria and is the attachment point for Braun's lipoprotein (BLP or Murein Lipoprotein). BLP is found in gram-negative cell walls and is one of the most abundant membrane proteins.

Methylguanidine (MG) is a guanidine compound deriving from protein catabolism. It is also a product of putrefaction.