[{"from": "human", "value": "Could you provide a description of this molecule? [C][O][C][=C][Branch1][P][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][Branch1][C][F][Branch1][C][F][F][N][C@H1][Branch2][Ring2][Branch2][C][=C][Branch1][#Branch2][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][F][N][=C][Ring1][O][N][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][O][C][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an antiviral agent which targets the DNA terminal transferase complex of the cytomegalovirus (CMV) and which is used to prevent CMV reactivation in immunocompromised patients. Letermovir has been associated with mild-to-moderate serum aminotransferase elevations during therapy but has not been linked to cases of clinically apparent acute liver injury."}]