BUTYROLACTONE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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BTHETERO-MONOCYCLIC HYDROCARBONS/OXYGEN MONOHETERO, 5-MEMBERED RING
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BTHYDROXYBUTYRIC ACIDS (ALIPHATIC SATURATED MONO-CARBOXYLIC ACIDS)
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BTLACTONES OF HYDROXYCARBOXYLIC ACIDS
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UDC547.7,0*0*0*1*3*3*1
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Descriptor GERBUTYROLACTON UND DERIVATE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Descriptor ENGBUTYROLACTONE AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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Descriptor FREBUTYROLACTONE ET DÉRIVÉS (HYDROCARBURES HÉTÉROCYCLIQUES)
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Variant GERLACTONE/BUTYROLACTON UND DERIVATE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Variant GERLAKTONE/BUTYROLAKTONE UND DERIVATE (HETEROCYCLISCHE KOHLENWASSERSTOFFE)
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Variant ENGLACTONES/BUTYROLACTONES AND DERIVATIVES (HETEROCYCLIC HYDROCARBONS)
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Variant FRELACTONES/BUTYROLACTONE ET DÉRIVÉS (HYDROCARBURES HÉTÉROCYCLIQUES)