The molecular formula C21H34O5 may refer to:
- Betaenone A, a secondary metabolite isolated from the fungus Pleospora betae
- Betaenone C, a secondary metabolite isolated from the fungus Pleospora betae
- Tetrahydrocortisol, a steroid and an inactive metabolite of cortisol
This set index page lists chemical structure articles associated with the same molecular formula.
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