[Lys8, Lys9]-Neurotensin (8-13) (JMV438), a Neurotensin analog, exerts its analgesic effects through activation of the G protein-coupled receptors NTS1 and NTS2, with Ki values of 0.33 nM and 0.95 nM for hNTS1 and hNTS2 receptors, respectively.

PF-4840154 is a potent, selective agonist of the rat and human TrpA1 channel and elicited TrpA1-mediated nocifensive behaviour in mouse, with EC50 of 97 nM and 23 nM for rTrpA1 and hTrpA1, respectively.

RK-16