The invention is a method of preparing multimodal ligands for hydrophobic
interaction chromatography (HIC), which comprises providing a cyclic
scaffold comprising a thiol, an amine and a carbonyl group;
derivatisation of the nitrogen with a reagent to introduce a primary
interaction; and aminolysis of the resulting derivative, whereby a
secondary interaction is introduced next to the carbonyl; wherein at
least one of the primary interaction and the secondary interaction
comprises a hydrophobic group and wherein non of said interactions
comprises charged groups, i.e. ion exchange ligands. The invention also
encompasses a separation medium comprising such multimodal ligands
immobilised to a base matrix.