[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a synthetic prodrug of ganciclovir, a nucleoside analogue of 2'-deoxyguanosine, with antiviral activity. After phosphorylation, valganciclovir is incorporated into DNA, resulting in inhibition of viral DNA polymerase, viral DNA synthesis, and viral replication. (NCI04)"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C@@H1][Branch2][Ring1][#C][C][=Branch1][C][=O][O][C][C][Branch1][Ring1][C][O][O][C][N][C][=N][C][=C][Ring1][Branch1][N][=C][Branch1][=Branch1][N][C][Ring1][=Branch1][=O][N][N]"}]