C19H26O4 explained

The molecular formula C₁₉H₂₆O₄ (molar mass: 318.407 g/mol, exact mass: 318.1831 u) may refer to:

• 2-Methoxyestriol (2-MeO-E3)
• 4-Methoxyestriol (4-MeO-E3)