PYRIMIDINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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BTDIAZINES (HETEROCYCLIC HYDROCARBONS)
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BTHETERO-MONOCYCLIC HYDROCARBONS/NITROGEN DIHETERO, 6-MEMBERED RING
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UDC547.853
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Descriptor GERPYRIMIDIN UND DERIVATE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Descriptor ENGPYRIMIDINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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Descriptor FREPYRIMIDINE ET DÉRIVÉS (HYDROCARBURES HÉTÉROCYCLIQUES)
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NTCARBONYL DERIVATIVES OF PYRIMIDINE (HETEROCYCLIC HYDROCARBONS)
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NTQUINAZOLINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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NTNITROPYRIMIDINES + AMINOPYRIMIDINES (HETEROCYCLIC HYDROCARBONS)
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NTPURINES (HETEROCYCLIC HYDROCARBONS)
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NTPYRROLOPYRIMIDINES AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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NTTHIOURACIL + MERCAPTOPYRIMIDINES (HETEROCYCLIC HYDROCARBONS)
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RTPYRIMIDINE BASES (BIOCHEMISTRY)