Lynestrenol

**Definition:** A synthetic progestational hormone used often in mixtures with estrogens as an oral contraceptive (CONTRACEPTIVES, ORAL).

**Tree numbers:** - D04.210.500.668.651.693.494

**Synonyms:** - 19-Norpregn-4-en-20-yn-17-ol, (17alpha)- - Ethinylestrenol - Linesterol - Linestrenol - Lynoestrenol