adb-4en-pinaca adb-4en-pinaca adb-4en-pinaca is a cannabinoid designer drug that has been found as an ingredient in some synthetic cannabis products, first appearing in early 2021. it is a reasonably potent cannabinoid agonist in vitro but has not been so widely sold as related compounds such as adb-pinaca and mdmb-4en-pinaca. adb-4en-pinacalegal statuslegal status ca: schedule ii de: npsg (industrial and scientific use only) uk: class b us: schedule i identifiers iupac name n--1-(pent-4-en-1-yl)-1h-indazole-3-carboxamide cas number2659308-44-6 ypubchem cid162705324chemspider103835283unii76qq7sdu32chemical and physical dataformulac19h26n4o2molar mass342.443 g·mol−13d model (jsmol)interactive image smiles nc(=o)(nc(=o)c1nn(cccc=c)c2ccccc21)c(c)(c)c inchi inchi=1s/c19h26n4o2/c1-5-6-9-12-23-14-11-8-7-10-13(14)15(22-23)18(25)21-16(17(20)24)19(2,3)4/h5,7-8,10-11,16h,1,6,9,12h2,2-4h3,(h2,20,24)(h,21,25)key:nxdlazxbalpfsn-uhfffaoysa-n legality in the united states, the dea has filed a notice for its intent to temporarily place adb-4en-pinaca into schedule i status starting on or after may 4th, 2023 for up to 2 years, during which it's possible the dea could file for permanent scheduling within those 2 years. if it's filed on may 4, 2023, and the dea does not file to permanent placement the temporary schedule i order will expire on may 4, 2025.