[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][N][Branch1][#Branch2][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O][C@@H1][C][C@H1][Branch1][=Branch2][C@@H1][Branch1][Ring2][O][Ring1][Branch1][C][O][O]"}, {"from": "gpt", "value": "The molecule is a pyrimidine 2'-deoxyribonucleoside that is the L-enantiomer of thymine. A synthetic thymidine nucleoside analogue with activity against HBV DNA polymerase. It has a role as an antiviral drug and an EC 2.7.7.49 (RNA-directed DNA polymerase) inhibitor. It is functionally related to a thymine. It is an enantiomer of a thymidine."}]