[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][Branch1][=Branch2][O][S][Ring1][=Branch1][=Branch1][C][=O][=O][Branch2][Ring1][C][C][=C][C][=Branch1][N][=C][Branch1][Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][Br][O][Br][C][=C][C][=Branch1][N][=C][Branch1][Branch2][C][=Branch1][Ring2][=C][Ring1][=Branch1][Br][O][Br]"}, {"from": "gpt", "value": "The molecule is 3H-2,1-Benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 3,5-dibromo-4-hydroxyphenyl groups. It is used as a laboratory indicator, changing from yellow below pH 3 to purple at pH 4.6, and as a size marker for monitoring the progress of agarose gel and polyacrylamide gel electrophoresis. It has also been used as an industrial dye. It has a role as a two-colour indicator, an acid-base indicator and a dye. It is a sultone, an arenesulfonate ester, a 2,1-benzoxathiole, a member of phenols and an organobromine compound."}]