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Jyutping tin1 dung1 sin1 on1
Pinyin tiān dōng xiān ān

Definitions (Wiktionary)
  1. noun, Hong-Kong, Mainland-China
    asparagine
    (syn.) 天冬醯胺

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Jyutping tin1 dung1 sin1 on1
Pinyin tiān dōng xiān àn

Definitions (CC-CEDICT)
  1. asparagine (Asn), an amino acid
Definitions (Wiktionary)
  1. noun, Hong-Kong, Mainland-China
    asparagine
    (syn.) 天冬醯胺