| 摘要 |
An adenine compound represented by the formula (1): (1) [wherein A1 and A2 each independently represents an (un)substituted aromatic carbocycle or (un)substituted aromatic heterocycle; L1, L2, and L3 each independently represents alkylene or a single bond, provided that any methylene or methine group in L2 or L3 may be bonded to the nitrogen atom adjacent to L2 and L3 to form a 4- to 7-membered saturated nitrogenous heterocycle; L4 represents alkylene or a single bond; R1 represents (un)substituted alkyl, (un)substituted aryl, etc.; R2 represents hydrogen or (un)substituted alkyl; R3 represents (un)substituted alkyl, etc.; and X represents oxygen, etc.] or a pharmaceutically acceptable salt of the compound. The compound and salt are useful as a medicine.
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