cumyl-cb-megaclone cumyl-cb-megaclone cumyl-cb-megaclone (cumyl-cbmgaclone, sgt-273) is a gamma-carboline based synthetic cannabinoid receptor agonist that has been sold as a designer drug, first being identified in hungary in april 2020. cumyl-cb-megaclonelegal statuslegal status uk: under psychoactive substances act identifiers iupac name 2,5-dihydro-2-(1-methyl-1-phenylethyl)-5-(cyclobutylmethyl)-1h-pyridoindol-1-one chemical and physical dataformulac25h26n2omolar mass370.496 g·mol−13d model (jsmol)interactive image smiles cc(c)(c1ccccc1)n5c=cc4n(cc2ccc2)c3ccccc3c4c5=o inchi inchi=1s/c25h26n2o/c1-25(2,19-11-4-3-5-12-19)27-16-15-22-23(24(27)28)20-13-6-7-14-21(20)26(22)17-18-9-8-10-18/h3-7,11-16,18h,8-10,17h2,1-2hkey:xabxfxhkuhkhfo-uhfffaoysa-n