| http://www.w3.org/ns/prov#value | - By subsequent reversed-phase chromatography on a silica gel derivatized with hydrocarbon atoms, e.g. a silica gel modified by alkyl radicals containing 18 C-atoms, and eluting with a mixture of a lower alkylnitrile such as acetonitrile with water, the epothilones are directly separated from one another, especially epothilone A and epothilone B; then, concentration takes place by means of distillat
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