[{"from": "human", "value": "Provide a description of this molecule. [C][O][C][=C][Branch2][Ring1][S][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][C][=N][C][=C][C][=C][C][=Branch1][N][=C][Branch1][#Branch1][C][=C][Ring1][=Branch1][Ring1][#Branch2][O][C][O][C][O][C]"}, {"from": "gpt", "value": "The molecule is an opiate alkaloid isolated from the plant Papaver somniferum and produced synthetically.  As a direct-acting smooth muscle relaxant, papaverine is not closely related to the other opium alkaloids in structure or pharmacological actions; its mechanism of action may involve the non-selective inhibition of phosphodiesterases and direct inhibition of calcium channels. This agent also exhibits antiviral activity against respiratory syncytial virus, cytomegalovirus, and HIV. (NCI04)"}]