29335980 (01/1996-12/1996) Heterocyclic compounds with nitrogen hetero-atom[s] only, containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure (excl. malonylurea `barbituric acid`, its derivatives and salts, and diazinon (ISO))
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29335980 (01/1996-12/1996) Heterocyclic compounds with nitrogen hetero-atom[s] only, containing a pyrimidine ring, whether or not hydrogenated, or piperazine ring in the structure (excl. malonylurea `barbituric acid`, its derivatives and salts, and diazinon (ISO))
