A compound of formula (I) or any of its pharmaceutically acceptable salt for use in the treatment and/or prevention of a RNA virus infection, and a RNA virus infection from group IV or V of the Baltimore classification




wherein R3 represents a chlorine atom or a hydrogen atom, R represents a (C1-C4)alkyl group, a (C3-C6)cycloalkyl group, a halogen atom, a (C1-C5)alkoxy group, a —SO2—NRaRb group, a —SO3H group, a —OH group, a —O—SO2—ORc group or a —O—P(═O)—(ORc)(ORd) group, R1 represents (i) a CF3 group, (ii) a (C1-C10)alkyl group, (iii) a (C3-C6)cycloalkyl or a (C3-C6)heterocycloalkyl group or (iv) a phenyl group or a naphthyl group, and R2 represents a hydrogen atom, a (C1-C10)alkyl group, a (C3-C6)cycloalkyl or a (C3-C6)heterocycloalkyl group and further relates to new compounds, to pharmaceutical compositions containing them and to synthesis process for manufacturing them.