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Jyutping bun2 bing2 on1 syun1
Pinyin běn bǐng ān suān

Definitions (CC-CEDICT)
  1. phenylalanine (Phe), an essential amino acid
Definitions (Wiktionary)
  1. noun, Mainland-China
    phenylalanine
    (syn.) 苯丙胺酸