[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch2][Branch1][#C][C@@H1][C@H1][Branch2][Branch1][=Branch2][C@@H1][Branch2][Branch1][Ring2][C@H1][Branch2][Ring2][#C][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C][C@H1][Branch2][Ring1][P][O][C@H1][Branch1][=Branch2][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][O][C][C@H1][Branch1][=C][O][C@@H1][Branch1][=Branch2][C@@H1][Branch1][Branch1][C@H1][Ring1][=Branch1][O][O][O][C][O][C][O][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a polysaccharide isolated from the cell walls of bacteria, plants, and fungi with immunostimulant and antineoplastic activities. In a solubilized form, beta-glucan binds to a lectin site within complement receptor 3 (CR3) on leukocytes, priming the receptor to trigger cytotoxic degranulation of leukocytes when leukocyte CR3 binds to complement 3 (iC3b)-coated tumors. Thus, the attachment of beta-glucan to CR3 of circulating leukocytes simulates leukocytes to kill iC3b-coated tumor cells in the same way as they kill iC3b-coated yeast. (NCI04)"}]