| abstract |
A novel adenine compound represented by the formula (1): wherein A represents an (un)substituted aromatic carbocycle or (un)substituted aromatic heterocycle; L1 and L2 each independently represents straighted or branched alkylene, etc.; R1 represents halogen, (un)substituted alkyl, (un)substituted alkenyl, (un)substituted alkynyl, (un)substituted cycloalkyl, (un)substituted aryl, or (un)substituted heteroaryl; R2 and R3 each independently represents hydrogen, or (un)substituted alkyl, (un)substituted alkenyl, (un)substituted alkynyl, (un)substituted cycloalkyl, (un)substituted saturated heterocycle, (un)substituted aryl, or (un)substituted heteroaryl, or R2 combines together with L2 or R3 to form (un)substituted 4- to 8-membered nitrogen-containing saturated heterocycle; X is oxygen, sulfur, SO, SO2, NR7, NR7CO wherein R7 is hydrogen or alkyl, or a single bond; provided that X is a single bond when R1 is halogen, or a pharmaceutically acceptable salt thereof. The compound and salt are useful as a medicine. |