Kemija - 2017. ljeto, 3.

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

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

${\mathrm{C}}_4{\mathrm{H}}_6\backslash mathrm\{C\}\_\{4\}\; \backslash mathrm\{H\}\_\{6\}$

${\mathrm{C}}_4{\mathrm{H}}_8\backslash mathrm\{C\}\_\{4\}\; \backslash mathrm\{H\}\_\{8\}$