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 dihydrochalcone and several homoisoflavonoids from Polygonatum odoratum are activators of adenosine monophosphate-activated protein kinase. Adenosine monophosphate (AMP)-activated protein kinase (AMPK) is a major cellular energy sensor and master regulator of metabolic homeostasis; thus, AMPK plays a central role in studies on diabetes and related metabolic diseases. From the rhizomes of Polygonatum odoratum (Mill.) Druce, six homoisoflavonoids (1-6) and one dihydrochalcone (7) were isolated, and the structures of polygonatones A-D (4-7) were elucidated by various spectroscopic analyses. Compounds 1-7 were evaluated for their effect on AMPK activation. The amount of active phosphorylated AMPK and acetyl-CoA carboxylase in rat liver epithelial IAR-20 cells increased when the cells were incubated with the aforementioned compounds. Specifically, (3R)-5,7-dihydroxyl-6-methyl-8-methoxyl-3-(4'-hydroxylbenzyl)-chroman-4-one (1), (3R)-5,7-dihydroxyl-6,8-dimethyl-3-(4'-hydroxylbenzyl)-chroman-4-one (2), (3R)-5,7-dihydroxyl-6-methyl-3-(4'-hydroxylbenzyl)-chroman-4-one (3), and polygonatone D (7) exhibited significant activation effects.
{"Chemical": ["homoisoflavonoids", "polygonatones A-D", "(3R)-5,7-dihydroxyl-6-methyl-3-(4\u0027-hydroxylbenzyl)-chroman-4-one", "polygonatone D", "AMP", "adenosine monophosphate", "(3R)-5,7-dihydroxyl-6,8-dimethyl-3-(4\u0027-hydroxylbenzyl)-chroman-4-one", "acetyl-CoA", "Adenosine monophosphate", "dihydrochalcone", "(3R)-5,7-dihydroxyl-6-methyl-8-methoxyl-3-(4\u0027-hydroxylbenzyl)-chroman-4-one"]}