Consider extraction into a non-polar solvent such as dichloromethane. Alternatively, consider solid phase extraction onto silica-based C18 with elution with dichloromethane.
The silica based C18 is suggested because some polymeric reverse phases may swell.
Such compounds can be eluted with organic solvents from reverse phase (non-aqueous reverse phase). For a prep-scale example, see: http://www.isco.com/WebProductFiles/Applications/101/Poster_and_Paper_Reprints/Facile_Isolation_of_Carotenoid_Antioxidants.pdf