| 2931.31 | 000 | Dimethyl methylphosphonate |
| 2931.32 | 000 | Dimethyl propylphosphonate |
| 2931.33 | 000 | Diethyl ethylphosphonate |
| 2931.34 | 000 | Sodium 3-(trihydroxysilyl)propyl methylphosphonate |
| 2931.35 | 000 | 2,4,6-Tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide |
| 2931.36 | 000 | (5-Ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl methylmethylphosphonate |
| 2931.37 | 000 | Bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl]methylphosphonate |
| 2931.38 | 000 | Salt of methylphosphonic acid and (aminoiminomethyl)urea (1 : 1) |
| 29.32 | | Heterocyclic compounds with oxygen hetero -atom(s) only. |
| 29.32 | | Compounds containing an unfused furan ring (whether or not hydrogenated) in the structure : |
| 2932.20 | 010 | 1 Coumarin, methylcoumarins and ethylcoumarins |
| 2932.20 | 020 | 2 Santonin |
| 2932.91 | 000 | Isosafrole |
| 2932.92 | 000 | 1-(1,3-Benzodioxol-5-yl)propan-2-one |
| 2932.93 | 000 | Piperonal |
| 2932.95 | 000 | Tetrahydrocannabinols (all isomers) |
| 29.33 | | Heterocyclic compounds with nitrogen hetero-atom(s) only. |
| 29.33 | | Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure : |
| 2933.11 | 000 | Phenazone (antipyrin) and its derivatives |
| 2933.19 | | Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure : |
| 2933.21 | | Hydantoin and its derivatives |
| 2933.21 | 100 | - 3-Bromo-1-chloro-5-dimethylhydantoin |
| 2933.29 | | Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure : |
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