PYRIDINE AND DERIVATIVES/POLYCYCLIC SYSTEMS, CONDENSED (HETEROCYCLIC HYDROCARBONS)
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BTHETERO-POLYCYCLIC HYDROCARBONS/NITROGEN AS HETEROATOM
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BTCONDENSED HETERO-POLYCYCLIC HYDROCARBONS/ONLY NITROGEN AS HETEROATOM
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BTPYRIDINE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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UDC547.89,9*1*1*0*2
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Descriptor GERPYRIDIN UND DERIVATE/POLYCYCLISCHE SYSTEME, KONDENSIERTE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Descriptor ENGPYRIDINE AND DERIVATIVES/POLYCYCLIC SYSTEMS, CONDENSED (HETEROCYCLIC HYDROCARBONS)
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Descriptor FREPYRIDINE ET DÉRIVÉS/COMPOSÉS POLYCYCLIQUES CONDENSÉS (HYDROCARBURES HÉTÉROCYCLIQUES)