Carboxyamide-function compounds; amide-function compounds of carbonic acid › Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof
292421Subheading
292421 — Ureines and their derivatives; salts thereof:
Ureines và các dẫn xuất của chúng; muối của chúng:
Codes under heading 292421
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