The invention relates to compounds of formulae (Ia), (Ib) or (Ic) wherein, A1 and A2, identical or different, are H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C2-C6) alkenyl, (C2-C6) alkynyl, (C1-C6) alkyl-ORa, (C1-C6) alkyl-SRa, (C1-C6) alkyl-NRaRb, ORa, SRa, NRaRb, or CORa A3 is H, OH or form a carbonyl with A4 A4 is H, OH or form a carbonyl with A3 A5 is H, CRaRbOH, F, OH or forms a double bond with X in the case where X is CH A6 is H or F X is CH2, CHF, CF2, CHOH, O, S, NRa or a simple bond, or X is CH in the case where A5 forms with X a double bond Y is P(O)(ORa)(ORb) or P(O)(ORa)(NRaRb) V is O or S A7 is H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C2-C6) alkenyl, (C2-C6) alkynyl or (C1-C6) alkyl-ORa A8 is OH or H, Ra and Rb, identical or different, are H, (C1-C6) alkyl, (C1-C6) fluoroalkyl, (C1-C6) alkyl-OH or (C1-C6) alkyl-O—(C1-C6) alkyl and their addition salts thereof with acids and bases, their preparation and their use in the antibacterial prevention and therapy, used alone or in association with antibacterials, antivirulence agents or drugs reinforcing the host innate immunity.
