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Cyclobutenes

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Cyclic compounds (5)
Cycloalkenes (5)
Four-membered rings (5)
Acids (1)
Cycloalkanes (1)
Cyclobutanes (1)
Hydrocarbons (1)
Ketones (1)
Organic acids (1)
Polycyclic organic compounds (1)
Tetracyclic compounds (1)

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Squaric acid (2892-51-5)  
squaric acid, disilver (+1) salt  ·  squaric acid, dipotassium salt  ·  squaric acid, monopotassium salt monohydrate
Squaric acid, also called quadratic acid because its four carbon atoms approximately form a square, is an organic compound with chemical formula C4H2O4. The conjugate base of squaric acid is the hydrogensquarate anion C4HO4−; and the conjugate base of the hydrogensquarate anion is the divalent squarate anion C4O42−. This is one of the oxocarbon anions, which consist only of carbon and oxygen.
Moniliformin (31876-38-7)  
Moniliformin is an unusual mycotoxin, a feed contaminant that is lethal to fowl, especially ducklings. Moniliformin is formed in many cereals by a number of Fusarium species that include Fusarium moniliforme, Fusarium avenaceum, Fusarium subglutinans, Fusarium proliferatum, Fusarium fujikuroi and others. It is mainly cardiotoxic and causes ventricular hypertrophy.
Cyclobutene (822-35-5)  
Cyclobutene is a cycloalkene. It is of interest as a fundamental value, not for practical applications. It is a colorless easily condensed gas.
Tricyclobutenobenzene (60323-52-6)  
Tricyclobutabenzene is an aromatic hydrocarbon consisting of a benzene core with three cyclobutane rings fused onto it. This compound and related compounds are studied in the laboratory because they are often display unusual conformations and because of their unusual reactivity. Tricyclobutabenzenes are isomers of radialenes and form an equilibrium with them.
Dewar benzene (5649-95-6)  
Dewar benzene or bicyclo[2.2.0]hexa-2,5-diene is a bicyclic isomer of benzene with the molecular formula C6H6. The compound is named after James Dewar who included this structure in a list of possible C6H6 structures in 1867. However, he did not propose it as the structure of benzene, and in fact he supported the correct structure previously proposed by August Kekulé in 1865.