BP-C1, solution for injections 0.05%, is currently being developed for treatment of patients with metastatic breast cancer with palliative intent. Active substance of the product, which is a novel platinum-containing anticancer agent developed for intramuscular administration, is cis-coordinated complexes of platinum(II) with the polymer of benzene polycarboxylic acids derived from lignin (CDBPA). The product is a complex between cis-diammineplatinum(II) derived core and an amphiphilic polymer, containing a composition of benzene polycarboxylic acids. The amphiphilic characteristics of the polymer have resulted in a product with clear and significantly altered and improved properties compared to other platinum analogues, e.g. cisplatin, carboplatin and oxaliplatin.