Resminostat (4SC-201) is a hydroxamate HDAC inhibitor (a novel class I, IIb, and IV histone deacetylase inhibitor). Resminostat inhibits proliferation of a large variety of rodent and human cancer cell lines, likely via the Akt signalling pathway. Phase I and II clinical trials have evaluated the efficacy and safety of resminostat in the treatment of relapsed or refractory Hodgkin's Lymphoma, hepatocellular carcinoma, advanced colorectal carcinoma, and in patients with advanced stage mycosis fungoides or Sezary syndrome (an aggressive form of blood cancer). Results in patients with hepatocellular carcinoma showed that resminostat (combined with sorafenib) was safe, well-tolerated and displayed early signs of efficacy.

Hymecromone (4-methylumbelliferone) is already approved drug in Europe and Asia where it is used to treat biliary spasm. It is used as choleretic and antispasmodic drugs and as a standard for the fluorometric determination of enzyme activity. The concomitant administration of Hymecromone with products, containing metoclopramide, leads to mutual decrease of their action. Due to a danger of diarrhea with subsequent hypokalemia, Hymecromone should be applied with caution to patients on cardiac glycosides therapy (in these cases the sensitivity to them is increased). Hymecromone can be administered simultaneously with otherspasmolytics and analgesics. Very rare allergic reactions, itching, erythema, rashes; diarrhea which normally disappears by reduction of dose or discontinuance of therapy.

Thymalfasin, a synthetic version of thymosin-α-1, a polypeptide (protein fragment) was being developed by SciClone Pharmaceuticals for the treatment of liver disease. SciClone developed and launched Thymalfasin, under the trade name Zadaxin, for the treatment of hepatitis B and hepatitis C virus infections. The drug is also being developed for the treatment of non-small cell lung cancer (NSCLC), hepatocellular carcinoma, AIDS and malignant melanoma. Thymalfasin exerts a dual action against infections: immune modulating and direct-acting effect. Thymalfasin exerts its immune-modulating activity through the interaction with Toll-like receptors (TLR), a group of proteins involved in the regulation of innate immunity, and in particular with TLR9 and TLR2 on dendritic cells (DCs) and precursor T-cells. Thymalfasin is also able to prevent a pro-inflammatory cytokine storm and possibly autoimmune events. Regarding direct-acting effects, Thymalfasin has been shown to increase the expression of MHC Class I and II, which are important for the antigen presentation and recognition by the immune system of the virally infected cells. v has also been shown to directly inhibit the in vitro growth of virally infected and cancer cells. Thymalfasin is not approved by the FDA but it is widely used in China and some other countries.