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:

Synthesis, crystal structure and antidiabetic activity of substituted (E)-3-(Benzo [d]thiazol-2-ylamino) phenylprop-2-en-1-one. A novel series of substituted (E)-3-(Benzo [d]thiazol-2-ylamino)phenylprop-2-en-1-onewere synthesized starting from 2-aminobenzothiazole and 1-aryl-3,3-bis- (methylsulfanyl)-2-propen-1-onesin the presence of a catalytic amount of sodium hydride in THF. The synthesised compounds' structures were confirmed by IR, Mass spectrometry, (1)H NMR, (13)C NMR and HRMS spectral data. These compounds were evaluated for their antidiabetic activity, and most of the derivatives of (E)-3-(Benzo [d]thiazol-2-ylamino)phenylprop-2-en-1-one displayed significant antidiabetic activity.
{"Chemical": ["(E)-3-(Benzo [d]thiazol-2-ylamino) phenylprop-2-en-1-one", "sodium hydride", "1-aryl-3,3-bis- (methylsulfanyl)-2-propen-1-ones", "(13)C", "(1)H", "THF", "(E)-3-(Benzo [d]thiazol-2-ylamino)phenylprop-2-en-1-one", "2-aminobenzothiazole"]}