What is "resminostat"

Resminostat (4SC-201 or RAS2410) is an orally bioavailable inhibitor of histone deacetylases (HDACs), of which inhibitors are antineoplastic agents.
In 2011, the German drug maker 4SC was granted orphan drug designation for resminostat by the Food and Drug Administration for the treatment of hepatocellular carcinoma (HCC).

In 2016 the FDA granted [another?] IND for clinical tests in combination with sorafenib for HCC. 4SC say "In several phase I and phase II trials, resminostat has already demonstrated very good safety and tolerability, alongside promising indications of efficacy."