Kemija - 2019. jesen, 30.

A. ${\mathrm{H}}_2\mathrm{N}\mathrm{C}\mathrm{H}\left({\mathrm{C}\mathrm{H}}_3\right){\mathrm{C}\mathrm{O}\mathrm{O}}^{-}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{NCH\}\backslash left(\backslash mathrm\{CH\}\_\{3\}\backslash right)\; \backslash mathrm\{COO\}^\{-\}$

B. ${\mathrm{H}}_3\mathrm{C}\mathrm{H}\left({\mathrm{C}\mathrm{H}}_3\right){\mathrm{C}\mathrm{O}\mathrm{O}}^{-}\backslash mathrm\{H\}\_\{3\}\; \backslash overset\{+\}\{\backslash mathrm\{N\}\}\; \backslash mathrm\{CH\}\backslash left(\backslash mathrm\{CH\}\_\{3\}\backslash right)\; \backslash mathrm\{COO\}^\{-\}$

C. ${\mathrm{H}}_3\mathrm{N}\mathrm{H}\left({\mathrm{C}\mathrm{H}}_3\right)\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\backslash mathrm\{H\}\_\{3\}\; \backslash overset\{+\}\{\backslash mathrm\{N\}\}\; \backslash mathrm\{N\}\; \backslash mathrm\{H\}\backslash left(\backslash mathrm\{CH\}\_\{3\}\backslash right)\; \backslash mathrm\{COOH\}$

D. ${\mathrm{H}}_2\mathrm{N}\mathrm{C}\mathrm{H}\left({\mathrm{C}\mathrm{H}}_3\right)\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{NCH\}\backslash left(\backslash mathrm\{CH\}\_\{3\}\backslash right)\; \backslash mathrm\{COOH\}$