Heterocyclic compounds with oxygen hetero-atom(s) only

293220Subheading

2932.20 — Lactones:

Lactones:

Distinguish from heading:2918Carboxylic acids with…3204Synthetic organic colouring…2936Provitamins and vitamins…2852Inorganic or organic compounds…2909Ethers, ether-alcohols…2910Epoxides, epoxyalcohols…2912Aldehydes, whether or not with…2930Organo-sulphur compounds

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