Menadiol ethylation nah?

I can’t tell what you mean by “Menadiol ethylation nah” from that phrase alone. Did you mean one of these?

- “Menadiol ethylation” (biochemistry/chemistry: turning menadiol into an ethylated form)
- “Menadiol ethylation = nah” (you’re asking why someone says it’s “no” or wrong)
- “Menadiol” / “menadiol ethylate” (a drug/supplement; often discussed in the context of Vitamin K2-type compounds)
- Something else in Hindi (“nah” = “नहीं”) about whether ethylation is correct

If you reply with the full sentence or where you saw it (exam question, lab context, product label, or a health claim), I can answer precisely.