“…The replacement of uracil by thiouracils in m-RNA can lead to misrecognition and results in mutation [37]. Interestingly, the substitution of oxygen by sulfur and further methyl-substitution of uracil results in modified nucleobases that have found use in many pharmacological applications [34,[38][39][40][41][42][43][44][45][46][47][48][49][50][51]. 2-Thiouracil and 4-thiouracil are well known for their use in antithyroid, anticancer [34,38,39], and heart disease treatments [40,41].…”