Astaxanthin intermediates

C - Chemistry – Metallurgy – 07 – F

Patent

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C07F 7/18 (2006.01) C07C 403/22 (2006.01)

Patent

CA 2057410

The novel intermediates have the formula (see formula I) wherein R1, R2 and R3 independently are C1-6-alkyl which may be branched or phenyl, and (see formula II) wherein R' is alkyl, alkoxy, NO2, NH2 or halogen.

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