VIP(6-28)(human, rat, porcine, bovine) is an effective antagonist of the actions of exogenous vasoactive intestinal peptide (VIP) on cAMP.

Nortrachelogenin ((-)-Wikstromol), which can be extracted from Partrinia scabiosaefolia, has antifungal activity and induces membrane disruption and cysteinyl asparagin-dependent apoptosis.

Phaclofen (3-Amino-2-(4-chlorophenyl)propanephosphonic acid) is a selective GABAB receptor antagonist, which can partially antagonize the sedative effect of (-)-baclofen, and reversibly antagonize the inhibition of cholinergic convulsive response of guinea pig ileum and distal colon by baclofen or GABA.