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  1. Methylene (compound) - Wikipedia

  2. Methylene (CH2) - Structure, Molecular Mass, Properties and …

  3. Methylene group - Wikipedia

  4. Methylene | CH2 | CID 123164 - PubChem

  5. Methylene Definition & Meaning - Merriam-Webster

  6. Methylene bridge - Wikipedia

  7. Methylene - NIST Chemistry WebBook

  8. Methylene - NIST Chemistry WebBook

  9. Methylene - Chemistry Library

  10. METHYLENE Definition & Meaning | Dictionary.com