This molecule, which has always been known as antimalarial, has come back into vogue in recent months due to the ongoing new coronavirus (2019-nCoV, or COVID-19 or 2019-nCo) worldwide pandemic, that causes a severe acute respiratory syndrome (SARS-CoV-2). In fact, several research groups have evaluated the use of CQ (C18H26ClN3) and in particular its derivative HCQ (C18H26ClN3O), as a promising treatment for COVID-19 patients [6,7,8].