Abstract: The invention relates to a compound having general formula (I): wherein n is equal to 3; R1 is an ethyl or isopropyl group; each of the R2 groups is independently of each other a hydrogen atom, a C1-C3 alkyl group or a halogen atom; one of the R3 and R4 groups represents a hydrogen atom while the other of the R3 and R4 groups represents an OH or OR5 group, where R5 can be a C2-C7 acyl group, an alkyl(C1-C6)animo-carbonyl group, an aralkyl(C1-C6)aminocarbonyl optionally substituted on the aryl, an arylcarbonyl group optionally substituted or a heteroarylaminocarbonyl group. Said compound is particularly suitable as an antiviral agent and especially as an anti-HIV-1 agent.