Patent ID: 8044056

Claim:
An adenine compound of the formula (1): [wherein R 1 is a halogen atom, a substituted or unsubstituted C 1-12 alkyl group, a substituted or unsubstituted C 2-10 alkenyl group, a substituted or unsubstituted C 2-10 alkynyl group, a substituted or unsubstituted C 3-8 cycloalkyl group, a substituted or unsubstituted 6- to 10-membered aryl group, or a substituted or unsubstituted 5- to 10-membered heteroaryl group, X is an oxygen atom, a sulfur atom, NR 2 (R 2 is a hydrogen atom or a C 1-6 alkyl group), SO, SO 2 or a single bond (when R 1 is a halogen atom, then X is a single bond), A 1 is a 4- to 8-membered substituted or unsubstituted, saturated nitrogen-containing heterocycle or an unsaturated non-aromatic nitrogen-containing heterocycle, said heterocycle containing 1 to 2 heteroatom(s) selected from 1 to 2 nitrogen atom(s), 0 to 1 oxygen atom and 0 to 1 sulfur atom, A 2 is a substituted or unsubstituted 6- to 10-membered aryl group or a substituted or unsubstituted 5- to 10-membered heteroaryl group, L 1 and L 2 are independently a C 1-12 alkylene group, a C2-12 alkenylene group, or a single bond, and any 1 to 3 methylene group(s) in said alkylene group or alkenylene group may be replaced by an oxygen atom, a sulfur atom, NR 3 (R 3 is a hydrogen atom or a C 1-6 alkyl group), SO, SO 2 , or a carbonyl group], or a pharmaceutically acceptable salt thereof.