Bicyclo Compounds, Heterocyclic [Chemical/Ingredient] Bicyclo Compounds, Heterocyclic C25986 Bicyclo Compounds, Heterocyclic N0000007813 Heterocyclic Cpds, Bicyclic A class of saturated compounds consisting of two rings only, having two or more atoms in common, containing at least one hetero atom, and that take the name of an open chain hydrocarbon containing the same total number of atoms. (From Riguady et al., Nomenclature of Organic Chemistry, 1979, p31) C0282650 D019086 Bicyclic Heterocyclic Compounds 82186 M0028488 Heterocyclic Bicyclo Compounds Bicyclo Compounds [Chemical/Ingredient] Heterocyclic Compounds, Bridged-Ring [Chemical/Ingredient] Heterocyclic Compounds, 2-Ring [Chemical/Ingredient]