Aziridines [Chemical Structural Class] Cyclopropanes and Cyclopropenes [Chemical Structural Class] Diazirines [Chemical Structural Class] Oxaziridines [Chemical Structural Class] Oxiranes [Chemical Structural Class] Thiiranes [Chemical Structural Class]

Azetidines [Chemical Structural Class] Cyclobutanes and Cyclobutenes [Chemical Structural Class] Oxetanes [Chemical Structural Class] Thietanes and Dithietanes [Chemical Structural Class]

Cyclopentadienes [Chemical Structural Class] Cyclopentanes [Chemical Structural Class] Cyclopentenes [Chemical Structural Class]

Dioxolanes [Chemical Structural Class] Dioxoles [Chemical Structural Class] Furans [Chemical Structural Class] Hydantoins [Chemical Structural Class] Imidazoles [Chemical Structural Class] Isothiazoles [Chemical Structural Class] Isoxazoles [Chemical Structural Class] Oxadiazoles [Chemical Structural Class] Oxazoles [Chemical Structural Class] Pyrazoles [Chemical Structural Class] Pyrroles [Chemical Structural Class] Pyrrolidines [Chemical Structural Class] Pyrrolines [Chemical Structural Class] Selenophenes [Chemical Structural Class] Siloles [Chemical Structural Class] Tetrahydrofurans [Chemical Structural Class] Tetrahydrothiophenes [Chemical Structural Class] Tetrazoles [Chemical Structural Class] Thiadiazoles [Chemical Structural Class] Thiazoles [Chemical Structural Class] Thiophenes [Chemical Structural Class] Triazoles [Chemical Structural Class]

Adamantanes [Chemical Structural Class] Anthracenes [Chemical Structural Class] Anthraquinones [Chemical Structural Class] Azobenzenes [Chemical Structural Class] Benzoquinones [Chemical Structural Class] Binaphthyls [Chemical Structural Class] Chalcones [Chemical Structural Class] Cinnamic Acids [Chemical Structural Class] Cyclohexanes [Chemical Structural Class] Pentafluorobenzenes [Chemical Structural Class] Perylenes [Chemical Structural Class] Polycyclic Aromatic Hydrocarbons (PAHs) [Chemical Structural Class] Pyrenes [Chemical Structural Class] Stilbenes [Chemical Structural Class] Tetracenes [Chemical Structural Class]

Cyclotriphosphazenes [Chemical Structural Class] Dioxanes [Chemical Structural Class] Dithianes [Chemical Structural Class] Morpholines [Chemical Structural Class] Oxazines [Chemical Structural Class] Piperazines [Chemical Structural Class] Piperidines [Chemical Structural Class] Pyrans [Chemical Structural Class] Pyrazines [Chemical Structural Class] Pyridazines [Chemical Structural Class] Pyridines [Chemical Structural Class] Pyrimidines [Chemical Structural Class] Tetrahydropyrans [Chemical Structural Class] Tetrazines [Chemical Structural Class] Thianes [Chemical Structural Class] Thiazines [Chemical Structural Class] Thiomorpholines [Chemical Structural Class] Triazines [Chemical Structural Class] Trioxanes [Chemical Structural Class] Trithianes [Chemical Structural Class]

Azepanes [Chemical Structural Class] Cycloheptanes [Chemical Structural Class] Diazepanes [Chemical Structural Class] Dioxepanes [Chemical Structural Class] Oxepanes [Chemical Structural Class] Thiepanes [Chemical Structural Class] Tropilidenes [Chemical Structural Class]

B (Boron) Compounds [Chemical Structural Class] Deuterium Compounds [Chemical Structural Class] Fluorine Compounds [Chemical Structural Class] Metal Compounds [Chemical Structural Class] Phosphorous Compounds [Chemical Structural Class] Si (Silicon) Compounds [Chemical Structural Class] Sulfur Compounds [Chemical Structural Class]

Acetylenes [Chemical Structural Class] Allenes [Chemical Structural Class] Amidines [Chemical Structural Class] Azides [Chemical Structural Class] Guanidines [Chemical Structural Class] Hydroxylamines [Chemical Structural Class] Isocyanates [Chemical Structural Class] Isonitriles [Chemical Structural Class] Isothiocyanates [Chemical Structural Class] Monofunctional Bifunctional Alkanes and α,ω-Bifunctional Alkanes [Chemical Structural Class] Monoprotected Diaminoalkanes [Chemical Structural Class] N-Substituted Maleimides, Succinimides & Phthalimides [Chemical Structural Class] Nitriles [Chemical Structural Class] Orthoesters [Chemical Structural Class] Thioureas [Chemical Structural Class] Ureas [Chemical Structural Class] ω-Functional Alkanols, Carboxylic Acids, Amines & Halides [Chemical Structural Class]

Ethylene Glycols and Monofunctional Ethylene Glycols [Chemical Structural Class] Metallocenes [Chemical Structural Class] Non-benzenoid Aromatic Compounds [Chemical Structural Class] Onium Salts [Chemical Structural Class] Radicals & Carbenes [Chemical Structural Class] Tetrazolium Salts & Formazans [Chemical Structural Class]