phytomenadione

• phytonadione

From phyt(ene) +‎ -o- +‎ menadione.

• (General American) IPA^(key): /ˌfaɪ.toʊˌmɛn.əˈdaɪˌoʊn/

phytomenadione (uncountable)

1. (biochemistry, pharmacology) A yellow oily naphthoquinone C₃₁H₄₆O₂ that is obtained especially from alfalfa, cabbage, spinach, and other leafy green vegetables or made synthetically and that has a fast, potent, and prolonged biological effect. It is essential for the blood-clotting process, effective orally, and useful especially in treating hypoprothrombinemia induced by anticoagulant drugs (trademark Mephyton).

• phylloquinone
• vitamin K₁

• “phylloquinone”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “vitamin K”, in Merriam-Webster.com Medical Dictionary, Springfield, Mass.: Merriam-Webster.