FUROPYRANS (HETEROCYCLIC HYDROCARBONS)
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BTFURAN (HETEROCYCLIC HYDROCARBONS)
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BTPYRANS AND THIOPYRANS (HETEROCYCLIC HYDROCARBONS)
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UDC547.722.1*1
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Descriptor GERFUROPYRANE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Descriptor ENGFUROPYRANS (HETEROCYCLIC HYDROCARBONS)
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Descriptor FREFUROPYRANNES (HYDROCARBURES HÉTÉROCYCLIQUES)
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Variant GERPYRAN UND DERIVATE/FUROPYRANE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Variant ENGPYRAN AND DERIVATIVES/FUROPYRANS (HETEROCYCLIC HYDROCARBONS)
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Variant FREPYRANNE ET DÉRIVÉS/FUROPYRANNES (HYDROCARBURES HÉTÉROCYCLIQUES)