1-(cis-2-Methyl-1-(2-thienyl)cyclohexyl)piperidine 68134-81-6 GK 11 GK-11 Gacyclidine Methyl-2-R-(piperidine-1-)-1-(thienyl-2)1-cyclohexene Piperidine, 1-(2-methyl-1-(2-thienyl)cyclohexyl)-, cis-