2009_Book_FoodChemistry

3.8 Unsaponifiable Constituents 237
Monocyclic Carotenes
γ-Carotene (ψ,β-carotene) (V) (3.123)
β-Zeacarotene (Va) (3.124)
Bicyclic Carotenes
α-Carotene (β,ε-carotene) (VI) (3.125)
β-Carotene (β,β-carotene) (VII) (3.126)
The importance of β-carotene as provitamin A is
covered under 6.2.1.
3.8.4.1.2 Xanthophylls
Hydroxy Compounds
Zeaxanthin (β,β-carotene-3,3 ′ -diol) (VIII) (3.127)
This xanthophyll is present in corn (Zea mays).
Lutein (β,ε-carotene-3,3 ′ -diol) (IX) (3.128)