[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a peptide sulfate salt obtained by combining leupeptin with 0.5 molar equivalents of sulfuric acid. It has a role as a calpain inhibitor, a cathepsin B inhibitor, an EC 3.4.21.4 (trypsin) inhibitor and a serine protease inhibitor."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][C@@H1][Branch2][Ring2][C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][C][N][=C][Branch1][C][N][N][C][=O][N][C][=Branch1][C][=O][C].[C][C][Branch1][C][C][C][C@@H1][Branch2][Ring2][C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][C][N][=C][Branch1][C][N][N][C][=O][N][C][=Branch1][C][=O][C].[O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]