The molecular formula C21H34O4 (molar mass: 350.49 g/mol, exact mass: 350.2457 u) may refer to:
- Tetrahydrocorticosterone, or 3α,5α-Tetrahydrocorticosterone
- U46619
The molecular formula C21H34O4 (molar mass: 350.49 g/mol, exact mass: 350.2457 u) may refer to: