A. \(\mathrm{H}_{2} \mathrm{NCH}\left(\mathrm{CH}_{3}\right) \mathrm{COO}^{-}\)
B. \(\mathrm{H}_{3} \stackrel{+}{\mathrm{N}} \mathrm{N} \mathrm{H}\left(\mathrm{CH}_{3}\right) \mathrm{COO}^{-}\)
C. \(\mathrm{H}_{3} \stackrel{+}{\mathrm{N}} \mathrm{N} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{COOH}\)
D. \(\mathrm{H}_{2} \mathrm{NCH}\left(\mathrm{CH}_{3}\right) \mathrm{COOH}\)
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