[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][Branch1][C][C][C@@H1][Branch2][Ring1][S][C][=Branch1][C][=O][O][C][C][C@H1][Branch2][Ring1][Ring1][C][N][C][=N][C][=C][Ring1][Branch1][N][=C][Branch1][=Branch1][N][C][Ring1][=Branch1][=O][N][C][O][N]"}, {"from": "gpt", "value": "The molecule is a prodrug form of the acyclic guanosine derivative omaciclovir with activity against varicella zoster virus (VZV) and other members of the herpesvirus family. Valomaciclovir is converted in vivo to omaciclovir, a nucleoside analog inhibitor of VZV DNA polymerase."}]