n-Tridecane is both a stress compound released by the brown marmorated stink bugs and an volatile oil component isolated from essential oil of Piper aduncum L. Tridecane.

3, 4-Dimethoxycinnamic acid, previously identified in plasma after coffee consumption, was rapidly absorbed in the free form most likely by passive diffusion in the upper gastrointestinal tract.

3'-Hydroxy-4'-methoxyacetophenone is an active P. spinosa extract. It possesses anti-inflammatory activity and prevented injuries due to administration of acetic acid in the colon.