CH4 CH3 甲基 Methyl Me CH3CH3CH3CH2乙基 Ethyl Et- CHCH2CH2-丙基 Propyl pr C3H8 CH3CH异丙基 Iso-Propyl i-Pr CH3C3H8 CH3CH3 CH4 CH3CH2CH2－ CH3CH2－ CH3－ 甲基 Methyl Me- 乙基 Ethyl Et- 丙基 Propyl pr- 异丙基 Iso-Propyl i-Pr￾CH3 CH3 CH－