 Examples include doxorubicin (adriamycin) and daunorubicin (both of which are used in treatment of Hodgkin's lymphoma), and dactinomycin (used in Wilm's tumour, Ewing's Sarcoma, rhabdomyosarcoma).Metallointercalators are complexes of a metal cation with polycyclic aromatic ligands.The most commonly used metal ion is ruthenium(II), because its complexes are very slow to decompose in the biological environment.