Acetoin (May exist as crystalline dimer), acetyl methyl carbinol, acetylmethylcarbino, dimethylketene O-ethyl Se-methyl selenoacetal, 3-Hydroxy-2-butanone, 2-hydroxybutan-3-one, 3-Hydroxybutan-2-one, 3-hydroxy-2-oxobutane, Acetylmethylcarbinol (May exist as crystalline dimer), Dimethylketol, 1-ethoxy-2-methyl-1-methylselanyl-propene