"2-Hexenoic acid, 4-[[(2S)-2-amino-3,3-dimethyl-1-oxobutyl]methylamino]-2,5-dimethyl-, ethyl ester, monohydrochloride, (2E,4S)-"
"2-Hexenoic acid, 4-[[(2S)-2-amino-3,3-dimethyl-1-oxobutyl]methylamino]-2,5-dimethyl-, ethyl ester, monohydrochloride, (2E,4S)-"