[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=N][C][=C][Branch1][=N][N][Ring1][Branch1][C][O][C][Branch1][Ring1][C][O][C][O][N][=C][Branch1][=Branch1][N][=C][Ring1][=C][O-1][N].[Na+1]"}, {"from": "gpt", "value": "The molecule is the sodium salt form of ganciclovir, a synthetic, antiviral, purine nucleoside analog with antiviral activity, especially against cytomegalovirus (CMV). Ganciclovir sodium is a prodrug that is phosphorylated and subsequently converted into its triphosphate form, the active metabolite ganciclovir-5-triphosphate (ganciclovir-TP), in the infected cells by cellular kinases. Ganciclovir-TP competes as a substrate with nucleotide triphosphates for viral DNA polymerase. Once it gets incorporated into DNA strand, it prevents further polymerization of DNA, thereby interfering with viral DNA replication."}]