https://doi.org/10.1351/goldbook.L03436
Cyclic @E02219@ derived by multiple esterification between two (usually) or more molecules of lactic acid or other hydroxy @C00852@.
They are designated as dilactides, trilactides, etc. according to the number of hydroxy acid residues, e.g. a dilactide (a 1,4-dioxane-2,5-dione):
L03436.png