Iso-butomidate is an anesthetic drug related to etomidate, which has been sold as a designer drug as an active ingredient in e-cigarette liquids marketed under names such as space oil or kpods. It has an iso-butyl ester group in place of the ethyl ester of etomidate.[1][2]
References
↑"Identification of iso-butomidate as a novel etomidate analog: Simultaneous determination of seven etomidate-type new psychoactive substances and etomidate acid in human hair by HPLC-MS/MS.". Toxicologie Analytique et Clinique. September 2025. doi:10.1016/j.toxac.2025.09.003.
↑"Identification and characterization of iso-butomidate metabolites in HLMs and mice by Liquid chromatography-high resolution mass spectrometry for drug control.". SSRN. 2025. doi:10.2139/ssrn.5387249.
