QUINOXALINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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BTHETERO-BICYCLIC HYDROCARBONS/NITROGEN DIHETERO
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BTHETERO-POLYCYCLIC AROMATIC HYDROCARBONS
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BTCONDENSED HETERO-POLYCYCLIC HYDROCARBONS/ONLY NITROGEN AS HETEROATOM
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BTPYRAZINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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UDC547.863.11
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Descriptor GERCHINOXALIN UND DERIVATE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Descriptor ENGQUINOXALINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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Descriptor FREQUINOAXILINE ET DÉRIVÉS (HYDROCARBURES HÉTÉROCYCLIQUES)
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Variant GERBENZOPYRAZIN UND DERIVATE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Variant GERPYRAZIN UND DERIVATE/BENZOPYRAZIN (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Variant ENGBENZOPYRAZINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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Variant ENGPYRAZINE AND DERIVATIVES/BENZOPYRAZINE (HETEROCYCLIC HYDROCARBONS)
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Variant FREBENZOPYRAZINE ET DÉRIVÉS (HYDROCARBURES HÉTÉROCYCLIQUES)
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Variant FREPYRAZINE ET DÉRIVÉS/BENZOPYRAZINE ET DÉRIVÉS (HYDROCARBURES HÉTÉROCYCLIQUES)