What are you separating them from? What have you tried already? It seems one should be able to purify them on silica gel or C18
Please refer to these following papers. I am not sure if these could help, but I agree with Dr. Jack Silver. You can give us a more detailed inquiry, stating what you've already done and literature you've already consulted. Regards!
Extraction and separation of anthraquinone glycosides:
http://onlinelibrary.wiley.com/doi/10.1002/jps.2600620606/abstract
Separation of 9,10-anthraquinone derivatives: evaluation of functionalised stationary phases in reversed phase mode:
http://www.ncbi.nlm.nih.gov/pubmed/21529815
Separation of 9,10-anthraquinone derivatives: evaluation of C18 stationary phases:
http://www.ncbi.nlm.nih.gov/pubmed/21227440
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