Toll-like receptor agonist

A compound of Formula (I),

• or a pharmaceutically acceptable salt thereof, wherein,
• n is an integer from 2 to 6;
• Y is
• R1 is hydrogen, C1-C6 alkyl, C1-C6 alkylamino, or C1-C6 alkoxy;
• R2 is C1-C8 alkyl;
• L is a bond or
• m is an integer from 1 to 6;
• X is CH or N;
• Het is a four-, five-, or six-membered saturated heterocycle;
• Z is
• R3 is C6-C20 alkyl, C6-C20 alkenyl, or C(O)R5;
• R4 is hydrogen, C6-C20 alkyl, C6-C20 alkenyl, or C(O)R5;
• R5 C6-C20 alkyl or C6-C20 alkenyl;
• R6 is (C2-C6 alkylene-O)p or a bond;
• and
• p is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ,11, 12, 13, 14, 15, 16, 17, 18, 19 or 20,
• wherein
• is the point of attachment to formula (I).