Kumbicin C inhibits the growth of NS-1 mouse myeloma cells (IC50 = 0.74 μg ml) and the growth of the Gram-positive bacteria B. subtilis (MIC = 1.6 μg ml).
SG3199 is a PBD dimer which binds in the minor groove of DNA, and forms covalent DNA interstrand cross-links in naked linear plasmid DNA. SG3199 is potently cytotoxic against a panel of human solid tumour and haematological cancer cell lines.