You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Chemical"].

Please return the output as a JSON object of the format: {"Chemical": ["Arsenic", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

A new bromobenzyl methyl sulphoxide from marine red alga Symphyocladia latiuscula. A new bromophenol, 2,3,6-tribromo-4,5-dihydroxybenzyl methyl sulphoxide, was isolated from the EtOH extract of the marine alga Symphyocladia latiuscula. Its structure was confirmed by spectroscopic methods (1D- and 2D-NMR, HR-ESI-MS). This new bromophenol showed moderate antifungal activity against Candida albicans with MIC value of 37.5 µg mL(-1).
{"Chemical": ["bromobenzyl methyl sulphoxide", "2,3,6-tribromo-4,5-dihydroxybenzyl methyl sulphoxide", "EtOH", "bromophenol"]}