"pentamethylcyclopentadiene" meaning in English

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      "expansion": "pentamethyl + cyclopentadiene",
      "name": "compound"
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  "etymology_text": "From pentamethyl + cyclopentadiene.",
  "forms": [
    {
      "form": "pentamethylcyclopentadienes",
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "The derivative of cyclopentadiene 1,2,3,4,5-pentamethylcyclopentadiene that is used in organic synthesis"
      ],
      "id": "en-pentamethylcyclopentadiene-en-noun-2GWKFnp6",
      "links": [
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          "organic chemistry",
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        [
          "cyclopentadiene",
          "cyclopentadiene"
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      "raw_glosses": [
        "(organic chemistry) The derivative of cyclopentadiene 1,2,3,4,5-pentamethylcyclopentadiene that is used in organic synthesis"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
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      "wikipedia": [
        "pentamethylcyclopentadiene"
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  "word": "pentamethylcyclopentadiene"
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  ],
  "etymology_text": "From pentamethyl + cyclopentadiene.",
  "forms": [
    {
      "form": "pentamethylcyclopentadienes",
      "tags": [
        "plural"
      ]
    }
  ],
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      "glosses": [
        "The derivative of cyclopentadiene 1,2,3,4,5-pentamethylcyclopentadiene that is used in organic synthesis"
      ],
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          "organic chemistry",
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        "(organic chemistry) The derivative of cyclopentadiene 1,2,3,4,5-pentamethylcyclopentadiene that is used in organic synthesis"
      ],
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        "chemistry",
        "natural-sciences",
        "organic-chemistry",
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  "word": "pentamethylcyclopentadiene"
}