| Nicotinamide ribotide | Organic compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Glycosyl compounds | Details |
| Quinolinic acid | Organic compounds | Organoheterocyclic compounds | Pyridines and derivatives | Pyridinecarboxylic acids and derivatives | Details |
| Thiamine | Organic compounds | Organoheterocyclic compounds | Diazines | Pyrimidines and pyrimidine derivatives | Details |
| Propionic acid | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Carboxylic acids | Details |
| Pyridoxine | Organic compounds | Organoheterocyclic compounds | Pyridines and derivatives | Pyridoxines | Details |
| Sulfite | Inorganic compounds | Homogeneous non-metal compounds | Non-metal oxoanionic compounds | Non-metal sulfites | Details |
| Protoporphyrin IX | Organic compounds | Organoheterocyclic compounds | Tetrapyrroles and derivatives | Porphyrins | Details |
| Pyruvic acid | Organic compounds | Organic acids and derivatives | Keto acids and derivatives | Alpha-keto acids and derivatives | Details |
| Riboflavin | Organic compounds | Organoheterocyclic compounds | Pteridines and derivatives | Alloxazines and isoalloxazines | Details |
| Porphobilinogen | Organic compounds | Organonitrogen compounds | Amines | Aralkylamines | Details |
| Sorbitol | Organic compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Sugar alcohols | Details |
| Taurine | Organic compounds | Organic acids and derivatives | Sulfonic acids and derivatives | Sulfonic acids | Details |
| Succinic acid | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Dicarboxylic acids and derivatives | Details |
| Thiosulfate | Inorganic compounds | Homogeneous non-metal compounds | Non-metal oxoanionic compounds | Non-metal thiosulfates | Details |
| Sucrose | Organic compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Glycosyl compounds | Details |
| Thymine | Organic compounds | Organoheterocyclic compounds | Diazines | Pyrimidines and pyrimidine derivatives | Details |
| Phosphoenolpyruvic acid | Organic compounds | Organophosphorus compounds | Organic phosphoric acids and derivatives | Phosphate esters | Details |
| Sarcosine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Phosphoserine | Organic compounds | Organic acids and derivatives | Carboxylic acids and derivatives | Amino acids, peptides, and analogues | Details |
| Thymidine | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleosides | Pyrimidine 2'-deoxyribonucleosides | Details |
| Phosphoribosyl pyrophosphate | Organic compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Monosaccharides | Details |
| Ribose | Organic compounds | Organooxygen compounds | Carbohydrates and carbohydrate conjugates | Monosaccharides | Details |
| Uridine triphosphate | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleotides | Pyrimidine ribonucleotides | Details |
| Uridine 5'-monophosphate | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleotides | Pyrimidine ribonucleotides | Details |
| Uric acid | Organic compounds | Alkaloids and derivatives | Not Available | Not Available | Details |
| Uridine diphosphate-N-acetylglucosamine | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleotides | Pyrimidine nucleotide sugars | Details |
| Xanthine | Organic compounds | Alkaloids and derivatives | Not Available | Not Available | Details |
| Xanthosine 5-triphosphate | Organic compounds | Nucleosides, nucleotides, and analogues | Purine nucleotides | Purine ribonucleotides | Details |
| Uridine 5'-diphosphate | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleotides | Pyrimidine ribonucleotides | Details |
| Uridine | Organic compounds | Nucleosides, nucleotides, and analogues | Pyrimidine nucleosides | Not Available | Details |
