Circle and name the aromatic heterocycles in the following structure, which has been found to be effective against inflammatory diseases including Alzheimer's disease and rheumatoid arthritis (J. Med. Chem. 2007, 4728). 
Definitions:
Diminishing-Balance
A method of depreciation that accelerates the rate at which an asset loses value, applying a constant rate to the declining book value each period.
Constant Percentage
A method or rate that does not change over time, often used in calculations of growth, discount, or interest rates.
Units-of-Production Method
A depreciation method that allocates the cost of an asset over its useful life based on the number of units it produces or hours it operates.
Depreciation Expense
An accounting method of allocating the cost of a tangible asset over its useful life, reflecting the asset's consumption, wear and tear, or obsolescence.
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