  Amino acids are the essential keys that contribute to the study of the
formation of life. The simplest amino acid, glycine (NH$_{2}$CH$_{2}$COOH), has
been searched for a long time in the interstellar medium, but all surveys of
glycine have failed. Since the detection of glycine in the interstellar medium
was extremely difficult, we aimed to search for the precursor of glycine. After
detailed searches of the individual prebiotic molecular species, we
successfully identified the emission lines of possible glycine precursor
molecule amino acetonitrile (NH$_{2}$CH$_{2}$CN) towards the hot molecular core
G10.47+0.03 using the Atacama Large Millimeter/Submillimeter Array. We
estimated the statistical column density of amino acetonitrile was
(9.10$\pm$0.7)$\times$10$^{15}$ cm$^{-2}$ with rotational temperature
($T_{rot}$) 122$\pm$8.8 K. The estimated fractional abundance of amino
acetonitrile was 7.01$\times$10$^{-8}$. We found that the estimated fractional
abundance of NH$_{2}$CH$_{2}$CN fairly agrees with the theoretical value
predicted by the three-phase warm-up model from Garrod (2013).
