[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a uremic toxin.  Uremic toxins can be subdivided into three major groups based upon their chemical and physical characteristics: 1) small, water-soluble, non-protein-bound compounds, such as urea; 2) small, lipid-soluble and/or protein-bound compounds, such as the phenols and 3) larger so-called middle-molecules, such as beta2-microglobulin. Chronic exposure of uremic toxins can lead to a number of conditions including renal damage, chronic kidney disease and cardiovascular disease.\nSpermine is associated with nucleic acids, particularly in viruses, and is thought to stabilize the helical structure. "}, {"from": "gpt", "value": "[C][Branch1][Branch2][C][C][N][C][C][C][N][C][N][C][C][C][N]"}]