| CPC C07D 487/04 (2013.01) [A61K 31/519 (2013.01); A61K 45/06 (2013.01)] | 13 Claims | 
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               1. A compound, being a compound represented by Formula I; or being a tautomer, a stereoisomer, a hydrate, a solvate, a salt, or a prodrug of the compound represented by Formula I, 
              ![]() wherein, 
                R1 and R2 are each independently selected from —H or —CH3, 
                provided that: 
                when R1 and R2 are not —H simultaneously; or 
                when R1 and R2 are not —CH3 simultaneously. 
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