Aliphatic chain compounds include aliphatic compounds and chain compounds containing other elements or groups. Aliphatic hydrocarbons are hydrocarbons with the basic properties of aliphatic compounds. In aliphatic compounds, carbon atoms are arranged in straight chain, branched chain or cyclic, which are respectively called straight chain aliphatic hydrocarbons, branched chain aliphatic hydrocarbons and alicyclic hydrocarbons. Some cyclic hydrocarbons are different in nature from aromatic hydrocarbons, and are very similar to aliphatic hydrocarbons. Such cyclic hydrocarbons are called alicyclic hydrocarbons. In this way, aliphatic hydrocarbons become a general term for all hydrocarbons except aromatic hydrocarbons. Aliphatic hydrocarbons and their derivatives (including halogenated hydrocarbons) and alicyclic hydrocarbons and their derivatives are collectively referred to as aliphatic compounds.
Olema Oncology is advancing the development of Palazestrant (OP-1250) in metastatic breast cancer in 2024. Palazestrant is an oral complete ER antagonist (CERAN) and selective ER degrader (SERD). It potently binds and completely blocks transcriptional activity of both wild-type and ESR1-mutant ER with favorable tolerability and anti-tumor activity.
Palazestrant is under clinical development both in combination with Novartis' CDK4/6 inhibitor Kisqali (Ribociclib) as a first-line therapy for advanced estrogen receptor-positive, HER2-negative breast cancer, and as a monotherapy compared to standard of care treatment in second- and third-line advanced or metastatic ER-positive, HER2-negative breast cancer.