Ethynyl Estradiol-d4

• CAT Number: S000273
• CAS Number: 350820-06-3
• Molecular Formula: C20H20D4O2
• Molecular Weight: 300.43
• Purity: ≥95%
• IUPAC Name: (8R,9S,13S,14S,17R)-2,4,16,16-tetradeuterio-17-ethynyl-13-methyl-6,7,8,9,11,12,14,15-octahydrocyclopenta[a]phenanthrene-3,17-diol
• InChI: InChI=1S/C20H24O2/c1-3-20(22)11-9-18-17-6-4-13-12-14(21)5-7-15(13)16(17)8-10-19(18,20)2/h1,5,7,12,16-18,21-22H,4,6,8-11H2,2H3/t16-,17-,18+,19+,20+/m1/s1/i5D,11D2,12D
• InChIKey: BFPYWIDHMRZLRN-LJEVPYBISA-N
• SMILES: CC12CCC3C(C1CCC2(C#C)O)CCC4=C3C=CC(=C4)O

Ethynyl estradiol-d4（Cat No.:S000273） is a deuterated form of ethynyl estradiol, where four hydrogen atoms are replaced with deuterium, enhancing its molecular stability and making it highly valuable as an internal standard for analytical methods such as mass spectrometry and NMR spectroscopy. Ethynyl estradiol is a synthetic estrogen commonly used in oral contraceptives and hormone replacement therapy. The incorporation of deuterium in ethynyl estradiol-d4 facilitates more accurate and detailed pharmacokinetic and metabolic studies, helping researchers to better understand the drug’s absorption, distribution, metabolism, and elimination processes in the body.