C₁₁H₁₆N₂O₃ may refer to:

• Butalbital
• Nifenalol
• Talbutal
• Vinbarbital
• Vinylbital

• Thymelicus sylvatica
• Thymelicus sylvatica occidentalis
• Thymen Arensman
• Thyme riceflower
• Thymiatris
• Thymiatris allocrossa
• Thymiatris arista
• Thymiatris cephalochra
• Thymiatris melitacma
• Thymiatris microloga
• Thymiatris scolia
• Thymiatris seriosa
• Thymica accessoria
• Thymica Accessoria
• Thymica accessoria arteries
• Thymica accessoria artery
• Thymic branches of internal thoracic arteries
• Thymic branches of the internal thoracic arteries
• Thymic branches of the internal thoracic artery
• Thymic epithelial cell
• Thymic vein
• Thymidine kinase 2, mitochondrial
• Thymidine kinase in clinical chemistry
• Thymidine:phosphate deoxy-alpha-D-ribosyltransferase
• Thymidylate 5'-phosphohydrolase