The E161 group are Xanthophylls, (from the Greek, Xanthos -
yellow). They are yellow pigments, although E161g
is more orange, and related to carotene. Extracted using the
solvent hexane they normally contain other source plant material.
Rhodoxanthin is present in small amounts in the seeds of the,
poisonous, yew tree (Taxus baccata).
It is not commercially available.
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