C8H16: H3C-(CH2)6-CH3C4H6: HC≡C-CH=CH2C3H8: H3C-CH2-CH3C9H12: H3C-(CH2)7-CH3C5H12: H3C-(CH2)3-CH3C4H8: H2C=CH-CH2-CH3
C8H16: H3C-(CH2)6-CH3
C4H6: HC≡C-CH=CH2
C3H8: H3C-CH2-CH3
C9H12: H3C-(CH2)7-CH3
C5H12: H3C-(CH2)3-CH3
C4H8: H2C=CH-CH2-CH3