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In organic chemistry, ethylenedioxy is a functional group with the structural formula R-O-CH₂-CH₂-O-R'. It is often attached to an aromatic ring.

Examples:

• 3,4-Ethylenedioxythiophene, a precursor to conductive polymer
• EDMA, an illicit analogue of methamphetamine.
• (ethylenedioxy)dimethanol, a biocidal formaldehyde releaser.

See also

• 1,3-Benzodioxole
• 1,4-Benzodioxine