CH, CHCHCH 正丁基 n-Butyl n-Bu- CH3CHCH2 C 41110 CH,异丁基so-Buy Bu CH3CH2CH-仲丁基 ch Second-butyl sec-Bu- CH3- 叔丁基 H Tetre-butyl t-Bu 3叔丁基 Tetre-butyl t-Bu CH3 CH2CH2 CH2- CH3 CH3CHCH2- │ CH3 CH3 CH2CH│ - CH3 CH3 CH3 -C-│ │ C4H10 正丁基 n-Butyl n-Bu- 异丁基 Iso-Butyl i-Bu- 仲丁基 Second-butyl sec-Bu-