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:

Compound and compositions as TGR5 agonists: WO2012082947. The patent application WO2012082947 claims novel compounds as agonists of a plasma membrane-bound bile acid receptor TGR5. By activating TGR5, the agonists improve glycemic control and enhance energy expenditure. The basic generic claim of the patent covers pyrazole derivatives, different permutations on the core pyrazole ring are covered in the subsidiary claims. The claimed compounds are human TGR5 agonists having potency in the nM range.
{"Chemical": ["pyrazole"]}