[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][Ring1][Ring1][N][C][=C][C][=Branch1][=Branch2][=N][C][=Branch1][Ring2][=N][Ring1][=Branch1][N][N][Branch1][Branch1][C][=N][Ring1][=Branch2][C@@H1][C][C@@H1][Branch1][Branch1][C][=C][Ring1][Branch1][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a monocarboxylic acid oxidation product of abacavir, in which the C-5' hydroxymethyl group has been oxidised to a carboxy group. One of the two major metabolites of abacavir in humans (the other is the 5'-glucuronide, CHEBI:64189). It has a role as a metabolite. It is functionally related to an abacavir."}]