Imidazoquinoline compounds and prodrugs thereof

A compound of Formula I

• or a pharmaceutically acceptable salt thereof, wherein
• X1 is H, halo, hydroxy, amino, cyano, trifluoromethyl, thiol, alkylthio, sulfoxide, sulfone, nitro, pentafluorosulfanyl, carboxylate, amide, ester, C1-C6 alkyl, C1-C6 alkoxy, aryl, aryloxy, C1-C6 alkanoyl, C1-C8 alkanoyloxy, aryloyl, aryloyloxy,
• X2 is H, hydroxyl,
• m is 1, 2, 3, 4, 5, 6, 7, or 8;
• n is 1, 2, or 3;
• p is 1, 2, 3, 4, 5, 6, 7, or 8;
• and
• X3 is CH2 or O;
• provided that at least one of X1 and X2 is not
• and
• wherein the compound of Formula I is not