Kemija - 2014./15. ljeto - 17.

$\mathrm{H}\mathrm{C}\mathrm{H}\mathrm{O}\backslash mathrm\{HCHO\}$

${\mathrm{H}\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{C}\mathrm{H}}_3\backslash mathrm\{HCOOCH\}\_\{3\}$

${\mathrm{C}\mathrm{H}}_3{\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{C}\mathrm{H}}_3\backslash mathrm\{CH\}\_\{3\}\; \backslash mathrm\{COOCH\}\_\{3\}$

${\mathrm{C}\mathrm{H}}_2\mathrm{O}\mathrm{H}(\mathrm{C}\mathrm{H}\mathrm{O}\mathrm{H}{)}_4\mathrm{C}\mathrm{H}\mathrm{O}\backslash mathrm\{CH\}\_\{2\}\; \backslash mathrm\{OH\}(\backslash mathrm\{CHOH\})\_\{4\}\; \backslash mathrm\{CHO\}$