C5H10是烯烃额 CH2=CH-CH2-CH2-CH3{1-戊稀}CH3-CH=CH-CH2-CH3 {2-戊稀}CH3-CH2-C(CH3)=CH2 {2-甲基-1戊稀} CH3-CH=C(CH3)-CH3 {2-甲基-2戊稀} CH2=CH-CH（CH3）-CH3 {3-甲基-1戊稀}