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Jyutping ji6 bing2 bun2
Pinyin yì bǐng běn

Definitions (Wiktionary)
  1. noun
    cumene; isopropylbenzene

異丙苯 [异--]

Jyutping
Pinyin yì bǐng běn

Definitions (CC-CEDICT)
  1. (chemistry) isopropylbenzene C9H12 (aka cumene)