The structure of objective product was confirmed by characterization with Fouriertransform infrared spectrum (FTIR), nuclearmagneticresonance (1H NMR) and mass spectrometer (MS).
The resulted D, L-lactide and glycolide were found to have ring structure by fouriertransform infrared spectrometry and proton nuclearmagneticresonance(1H NMR) spectrometry.