[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring1][Ring1][C][C][Branch1][#Branch1][O][C@H1][Ring1][=Branch1][C][=O][Branch1][=Branch1][C][=Branch1][C][=O][O][O][O]"}, {"from": "gpt", "value": "The molecule is the diketoaldonic acid derivative that is N-acetylneuraminic acid after formal dehydroxylation and subsequent removal of C-8 and C-9, and reduction of the 7-hydroxy group. It is a diketoaldonic acid derivative and an aldehyde. It is functionally related to a N-acetylneuraminic acid."}]