α, β
β, α
α, α
.
β−butyne
Unsymm, dimethyl acetylene
α−methyl propyne
Dimethyl acetylene
(CH3)2CHOH
CH3 − CHOH − CH2 − CH3
(CH3)2CHCH2OH
(CH3)3OH
Maleic acid
Tartaric acid
Citric acid
Lactic acid