Hydroxytetracaine is a local agent that can suppress or relieve pain[1].
Definition
ChEBI: Hydroxytetracaine is a member of phenols and a benzoate ester. It is functionally related to a salicylic acid.
References
[1] Schmidt AC, et al. Solid-state characterization of non-stoichiometric hydrates of ester-type local anaesthetics. Part XI. Crystal polymorphism of local anaesthetic drugs. Int J Pharm. 2006 Aug 31;320(1-2):4-13. DOI:10.1016/j.ijpharm.2006.04.017