There is a little information in the literature related to the biological and pharmacological activity of estriol triacetate. And it has never been marketed.

Ent-atorvastatin (3S,5S-atorvastatin) is impurity and inactive enantiomer of lipid-lowering agent Atorvastatin.

Fulvestrant Beta-Isomer, also known as Fulvestrant EP Impurity A. Fulvestrant, sold under the trade name Faslodex among others, is an estrogen receptor antagonist indicated for the treatment of hormone receptor (HR)-positive metastatic breast cancer in postmenopausal women with disease progression as well as HR-positive, HER2-negative advanced breast cancer in combination with palbociclib in women with disease progression after endocrine therapy.