CANDIDATE SPACE MOLECULES. “Other groups have also reported experimental evidence of the formation of amino acid precursors on exposure to high-energy particles. Kobayashi et al. irradiated several ice mixtures composed of methane, CO and ammonia with high-energy protons. The results of quadrupole mass spectrometry and ion exchange chromatography showed the formation of amino acids, such as glycine and alanine, and some hydrocarbons.”
https://royalsocietypublishing.org/doi/10.1098/rsif.2016.0459