p-O-Methyl-isoproterenol (CAS No: 3413-49-8) or 5-(1-hydroxy-2-(isopropylamine)ethyl)-2-methoxyphenyl is a derivative of Isoproterenol that is a non-selective v receptor agonist that is used in patients with bradycardia and bronchial asthma.
Ogata, Aya, et al. “Brain Pharmacokinetics and Biodistribution of 11C-Labeled Isoproterenol in Rodents.” Nuclear Medicine and Biology, vol. 86-87, July 2020, pp. 52–58, https://doi.org/10.1016/j.nucmedbio.2020.06.002.