cumyl-bc-hpmegaclone-221 cumyl-bc-hpmegaclone-221 cumyl-bc-hpmegaclone-221 (cumyl-bchpmegaclone, sgt-271) is a gamma-carboline derivative which is a synthetic cannabinoid that has been sold as a designer drug. it was first identified in germany in september 2020. cumyl-bc-hpmegaclone-221legal statuslegal status ca: schedule ii de: npsg (industrial and scientific use only) uk: under psychoactive substances act identifiers iupac name 5-(methyl)-2-(2-phenylpropan-2-yl)-1h,2h,5h-pyridoindol-1-one pubchem cid163190698chemical and physical dataformulac28h30n2omolar mass410.561 g·mol−13d model (jsmol)interactive image smiles cc(c)(c1ccccc1)n1c=cc2n(cc3cc4ccc3c4)c3ccccc3c2c1=o inchi inchi=1s/c28h30n2o/c1-28(2,22-8-4-3-5-9-22)30-15-14-25-26(27(30)31)23-10-6-7-11-24(23)29(25)18-21-17-19-12-13-20(21)16-19/h3-11,14-15,19-21h,12-13,16-18h2,1-2h3key:vfbnnqohbyevlu-uhfffaoysa-n