[{"from": "human", "value": "What can you tell me about this molecule? [C][C][C@@H1][Branch1][#Branch1][O][C@@H1][Ring1][Branch1][C][O][N][C][=C][C][=Branch1][=Branch1][=N][C][Ring1][=Branch1][=O][N]"}, {"from": "gpt", "value": "The molecule has been replaced by a hydrogen. This modification prevents the formation of 5' to 3' phosphodiester linkages, which are needed for the elongation of DNA chains, thus resulting in the termination of viral DNA growth. The compound is a potent inhibitor of HIV replication at low concentrations, acting as a chain-terminator of viral DNA by binding to reverse transcriptase. Its principal toxic side effect is axonal degeneration resulting in peripheral neuropathy."}]