2,2-dimethyl-1-thia-4-azaspiro[4.5]dec-3-ene

2-chloro-2-methyl-N-prop-2-enylpropan-1-imine

3-ethoxybutan-2-one

3-methoxybutan-2-one

2,2,5,5-tetramethyl-1,3-oxazole