[{"from": "human", "value": "Provide a description of this molecule. [C][C][Branch1][C][C][C@@H1][Branch2][Ring1][Ring2][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@H1][Branch1][#Branch2][C][C][C][N][=C][Branch1][C][N][N][N][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a serine/cysteine protease inhibitor originally isolated from various strains of actinomycetes. Early studies investigated the potential for antipain to alter DNA damage and chromosomal aberrations in irradiated cells or those treated with chemical mutagens such as N-methyl-N'-nitro-N-nitrosoguanidine (MNNG).  Antipain was used in 2010 to obtain a crystal structure of the Leishmania major oligopeptidase B (OPB), a serine protease that serves as a virulence factor in trypanosomatids. The binding of antipain to OPB has been used in molecular dynamic studies to identify other OPB inhibitors with more favourable pharmacodynamic and pharmacokinetic properties for potential development as anti-trypanosomatid drugs."}]