Table 3.

Carotenoids in E. ramosum (in order of polarity)a

No.CarotenoidCommon nameChemical formula
1β,β-Caroteneβ-CaroteneC40H56
21,1′-Dimethoxy-3,4,3′4′-tetradehydro-1,2,1′,2′-tetrahydro-ψ,ψ-caroteneSpirilloxanthinC42H60O2
33-Hydroxy-1′-methoxy-3′,4′-didehydro-1′,2′-dehydro-β,ψ-caroten-19′-alBacteriorubixanthinalC41H56O3
43,3′-Dihydroxy-β,β-caroteneZeaxanthinC40H56O2
53,3′-Dihydroxy-β,β-carotene-4-oneAdonixanthinC40H54O3
62,3,3′-Trihydroxy-β,β-caroteneCaloxanthinC40H56O3
73,2′,3′-Trihydroxy-β,β-carotene-4-one (probable structure)NoneC40H54O4
82,3,2′,3′-Tetrahydroxy-β,β-caroteneNostoxanthinC40H56O4
92,3,2′,3′-Tetrahydroxy-β,β-carotene-4-oneNoneC40H54O5
103,2′,3′-Trihydroxy-β,β-carotene-4-one-3-sulfateErythroxanthin sulfateC40H54O7S
  • a Modified from reference211.