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adamantane

A colorless, crystalline chemical compound with a camphor-like odor hydrocarbon C10H16; m.p. 269°C, with a density equal to 1.08 g/cm3 (20 °C). Poorly soluble in water but soluble in hydrocarbons. It is found in certain petro­leum fractions. The structure con­tains three symmetrically fused cyclohexane rings.