1. APIs
  2. Ethinyl Estradiol
  3. Impurities
  4. 2-Methyl-ethinylestradiol

2-Methyl-ethinylestradiol

Structure

MOL SDF CML

Other Names & Identifiers

  • BP Ethinylestradiol Impurity M
  • 2-methyl-19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol

CASRN

3240-39-9

Molecular Formula

C21H26O2

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References

  1. Online Subscription Database. Reed Elsevier Properties SA. (View all citations for this reference)

Molecular Weight

310.43 g/mol

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References

  1. Online Subscription Database. Reed Elsevier Properties SA. (View all citations for this reference)

CAS Number

3240-39-9

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References

  1. National Center for Biotechnology Information. PubChem Compound Database; CID=11150565. (View all citations for this reference)

Structural Difference From API

The H group on EE's C2 is replaced with a methyl group

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References

  1. BP 2015; vol. I, pages 903 - 905
    2. (View all citations for this reference)

Source from API

Possible ortho methylation

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References

  1. BP 2015; vol. I, pages 903 - 905
    2. (View all citations for this reference)

Reaxys ID Number

6521424

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References

  1. Online Subscription Database. Reed Elsevier Properties SA. (View all citations for this reference)

Pub Chem CID Number

13991395

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References

  1. National Center for Biotechnology Information. PubChem Compound Database; CID=11150565. (View all citations for this reference)

Limits

0.10%

References

  1. European Pharmacopoeia 8.2 Ethinyl Estradiol
    2. (View all citations for this reference)
  2. British Pharmacopoeia 2017: Ethinylestradiol monograph
    3. (View all citations for this reference)