$HCOO$: fomat
$CH_3COO$: axetat
$C_2H_5COO$: propionat
$CH_3-CH_2-CH_2-COO$: butirat
$CH_3-CH(CH_3)-COO$: isobutirat
$CH_3-[CH_2]_3-COO$: valerat
$CH_3-CH(CH_3)-CH_2-COO$: isovalerat
$CH_2=CHCOO$: acrylat
$CH_2=C(CH_3)COO$: metacrylat
$C_6H_5COO$: benzoat
$CH_3-CH=CH-COO$: crotonat