Antiviral compounds

A compound according to formula (I)

• wherein
• R1 is a methyl or ethyl group;
• R2 is R3, R4 or R8;
• “X” is O, S, or NH;
• and
• “A” is a C3-7 alkanediyl if R2 is R3 and a C2-7 alkanediyl if R2 is R4 or R8, wherein X and R2 are connected to different carbon atoms of said alkanediyl and wherein said different carbon atoms are the carbon atoms in said alkanediyl being most spaced apart;
• R3 is selected from the group consisting of N(C0-3 alkyl)C(O)R5, OC(O)R5, C(O)N(C0-3 alkyl)R5 and C(O)OR5, wherein R5 is a straight carbon chain comprising 14 to 30 carbon atoms;
• said carbon chain is saturated or comprises one or more double and/or triple bond(s);
• furthermore, said carbon chain is unsubstituted or substituted with one or more C1-C5 alkyl groups;
• R4 is a substituent according to formula (II)
• D(CH2)m(OCH2CH2)n(CH2)pER7 (II)
• wherein
• “D” is connected to “A”;
• “D” is selected from the group consisting of N(C0-3 alkyl)C(O), OC(O), C(O)N(C0-3 alkyl), and C(O)O;
• the integer “m” is 0 (zero) to 3;
• the integer “n” is 1 to 15;
• the integer “p” is 0 (zero) to 3;
• “E” is selected from the group consisting of N(C0-3 alkyl)C(O), OC(O), C(O)N(C0-3 alkyl), and C(O)O;
• R7 is selected from the group consisting of R5, as defined above, and R6, wherein R6 is a substituent according to formula (III)
• wherein each R5, independently, is as defined above, and the C2-5 alkanediyl is attached to “E”;
• and
• R8 is selected from the group consisting of N(C0-3 alkyl)C(O)R9, OC(O)R9, C(O)N(C0-3 alkyl)R9 and C(O)OR9, wherein R9 is a substituent according to formula (IV)
• wherein each R5, independently, is as defined above;
• as an acid in its non-charged protonated form, a pharmaceutically acceptable addition salt, solvate, or solvate of a salt thereof.