- CH₂ - CH₂ - CH₂

2
3
I
CH₂
CH₂-CH₂
CH₂
O 2,3-dimethylpentane
O2-methyl-3-methylpentane
O2,3-methylpentane
O 2-methyl-3-ethylbutane

CH CH CH 2 3 I CH CHCH CH O 23dimethylpentane O2methyl3methylpentane O23methylpentane O 2methyl3ethylbutane class=