catechin

/K AE1 T AH0 K IH0 N/
noun
  1. 1

    A flavanol derived from catechol (2R,3S)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-2H-chromene-3,5,7-triol

Source: https://en.wiktionary.org/wiki/catechin