[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][Branch2][Ring2][N][N][C][=Branch1][C][=O][C][=C][Branch1][O][N][Branch1][#Branch1][C][Ring1][#Branch1][=N][Ring1][#Branch2][C][N][Branch1][Branch1][C][=N][Ring1][=Branch2][C@H1][C@@H1][Branch1][=N][C@@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][Branch1][C][O][O][O][C][C][C@@H1][Branch1][#Branch1][C][=Branch1][C][=O][O][C][N][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "The molecule is a nucleoside analogue having methyl (2S)-4-(4,6-dimethyl-9-oxo-4,9-dihydro-3H-imidazo[1,2-a]purin-7-yl)-2-[(methoxycarbonyl)amino]butanoate as the modified nucleobase. It is a nucleoside analogue, a methyl ester and a carbamate ester. It is functionally related to a guanosine."}]