C70-(malonic acid)n is a fullerene derivative that is synthesized by reacting C70 with malonic acid, a dicarboxylic acid. The resulting product is a water-soluble fullerene derivative with multiple malonic acid functional groups attached to its surface.

WSC70MA is a precursor to water-soluble fullerene derivatives can be used in medicinal research for the domain of neurodegenerative diseases, cancer, viral infection, and drug tolerances for its properties as antioxidant, antibacterial, and antiproliferative agent. This product can be custom-made with various counter ions to make it water-soluble.