(1R,2S,5S)-6,6-Dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylic acid methyl ester Hydrochloride;Methyl(1R,2S,5S)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylate Hydrochloride;