Heterocyclic Compounds, 3-Ring. Fused Heterocyclic Compounds, Three-Ring . Heterocyclic Cpds, 3 Ring . Three Ring Heterocyclic Compounds . 3-Ring Heterocyclic Compounds . Fused Heterocyclic Compounds, Three Ring . Heterocyclic Compounds, 3 Ring . A class of heterocyclic compounds that include a three-ring fused structure. Both aromatic or non-aromatic ring structures are included in this category. . 1.00
Heterocyclic Compounds, 2-Ring. Fused Heterocyclic Compounds, Two-Ring . Two Ring Heterocyclic Compounds . 2-Ring Heterocyclic Compounds . Fused Heterocyclic Compounds, Two Ring . Heterocyclic Compounds, 2 Ring . A class of heterocyclic compounds that include a two-ring fused structure. Both aromatic and non-aromatic ring structures are included in this category. . 0.88
Heterocyclic Compounds, Fused-Ring. Compounds, Fused-Ring Heterocyclic . Fused-Ring Heterocyclic Compounds . Heterocyclic Compounds, Fused Ring . Multiple ring heterocyclic compounds containing two or more rings that share two atoms and one bond in common. . 0.86
Heterocyclic Compounds, 4 or More Rings. Five Ring Heterocyclic Compounds . Four Ring Heterocyclic Compounds . Fused Heterocyclic Compounds, Five-Ring . Fused Heterocyclic Compounds, Four-Ring . Heterocyclic Compounds with Four or More Rings . Heterocyclic Compounds, 4-Ring . Heterocyclic Compounds, 5-Ring . Heterocyclic Cpds, 4 Ring . Heterocyclic Cpds, 4 or More Rings . Heterocyclic Cpds, 5 Ring . 4-Ring Heterocyclic Compounds . 5-Ring Heterocyclic Compounds . Fused Heterocyclic Compounds, Five Ring . Fused Heterocyclic Compounds, Four Ring . Heterocyclic Compounds, 4 Ring . Heterocyclic Compounds, 5 Ring . Heterocyclic Compounds with 4 or More Rings . A class of heterocyclic compounds that include four or more fused rings. Both aromatic or non-aromatic ring structures are included in this category. . 0.83
