4-HTMPIPO is a synthetic cannabinoid drug first identified in smoking products purchased from online vendors in 2012. 4-HTMPIPO is the product resulting from the electrophilic addition of water to the cyclopropane moiety of synthetic cannabinoid UR-144. Nothing is known about the in vitro or in vivo pharmacology of 4-HTMPIPO.
^ abKavanagh P, Grigoryev A, Savchuk S, Mikhura I, Formanovsky A (August 2013). "UR-144 in products sold via the Internet: identification of related compounds and characterization of pyrolysis products". Drug Testing and Analysis. 5 (8): 683–92. doi:10.1002/dta.1456. PMID23315949.