HCOOH+C4H9OH--st. H2SO4-->HCOOC4H9+H2O
C3H7COOH+CH3OH--st. H2SO4-->C3H7COOCH3+H2O
CH3COOH+C3H7OH--st. H2SO4-->CH3COOC3H7+H2O
HCOOH+C2H5OH--st. H2SO4-->HCOOC2H5+H2O
C3H7COOH+C2H5OH--st. H2SO4-->C3H7COOC2H5+H2O
CH3COOH+CH3OH--st. H2SO4-->CH3COOCH3+H2O
C2H5COOH+C3H7OH--st. H2SO4--->C2H5COOC3H7+H2O