The molecular formula C21H26O2 (molar mass : 310.42 g/mol, exact mass : 310.19328) may refer to:
- Altrenogest
- Cannabinol
- Cannabinodiol
- Gestodene, a progesterone contraceptive hormone
- Mestranol
- Plomestane
The molecular formula C21H26O2 (molar mass : 310.42 g/mol, exact mass : 310.19328) may refer to: