5-Methylcytosine is a methylated nucleotide base found in eukaryotic DNA. In animals the DNA methylation of cytosine to form 5-methylcytosine is found primarily in the palindromic sequence CpG. In plants the methylated sequence is CpNpGp where N can be any base. 5-Methylcytosine is an epigenetic modification formed by the action of DNA methyltransferases.

Fudosteine is a novel mucoactive agent and a MUC5AC mucin hypersecretion inhibitor.

A compound that exhibits anti-inflammatory and immunomodulatory effects by inhibiting lipid mediator and cytokine release from inflammatory cells and interfering with PDGF- and TGF-β1-induced proliferation and migration of vascular medial smooth muscle cells.