[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a a deoxyketohexose comprising L-tagatose with the hydroxy group at position 6 replaced by hydrogen. It has a role as a human metabolite and an Escherichia coli metabolite."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][#C][C@H1][Branch1][O][C@H1][Branch1][#Branch1][C][=Branch1][C][=O][C][O][O][O][O]"}]