1. APIs
  2. Levonorgestrel
  3. Impurities
  4. 13-Ethyl-3-methoxy-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol

13-Ethyl-3-methoxy-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol

Structure

MOL SDF CML

Other Names & Identifiers

  • BP Levonorgestrel Impurity S

CASRN

176254-10-7

Structural Difference from API

methoxy at C3 instead of carbonyl; double bond between C3 & C4 and C5 & C6 instead of C4 & C5

References

Molecular Formula

C22H30O2

References

Molecular Weight

326.48 g/mol

References

Limits

0.2%

References

  1. British Pharmacopoeia 2017: Levonorgestrel monograph.
    2. (View all citations for this reference)