3-((5-(4-Hydroxy-2,2,5-trimethyl-1-piperidinyl)-1,1-dimethyl-2,4-pentadiynyl)oxy)propanenitrile monohydrochloride 37697-57-7 Propanenitrile, 3-((5-(4-hydroxy-2,2,5-trimethyl-1-piperidinyl)-1,1-dimethyl-2,4-pentadiynyl)oxy)-, monohydrochloride