DIAZINES (HETEROCYCLIC HYDROCARBONS)
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BTHETERO-MONOCYCLIC HYDROCARBONS/NITROGEN DIHETERO
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UDC547.852/.853
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Descriptor GERDIAZINE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Descriptor ENGDIAZINES (HETEROCYCLIC HYDROCARBONS)
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Descriptor FREDIAZINES (HYDROCARBURES HÉTÉROCYCLIQUES)
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NTPYRAZINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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NTPYRIDAZINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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NTPYRIMIDINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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RTDIAZINES (PESTICIDE AGENTS)