Kemija - 2018. jesen, 21.

${\mathrm{C}\mathrm{H}}_3{\mathrm{N}\mathrm{H}}_2\backslash mathrm\{CH\}\_\{3\}\; \backslash mathrm\{NH\}\_\{2\}$

${\mathrm{C}\mathrm{C}\mathrm{l}}_4\backslash mathrm\{CCl\}\_\{4\}$

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{C}\mathrm{H}}_3\backslash mathrm\{C\}\_\{6\}\; \backslash mathrm\{H\}\_\{5\}\; \backslash mathrm\{CH\}\_\{3\}$

${\mathrm{C}}_2{\mathrm{H}}_4\backslash mathrm\{C\}\_\{2\}\; \backslash mathrm\{H\}\_\{4\}$