1,3-Dioxan-2-one, polymer with 3,6-dimethyl-1,4-dioxane-2,5-dione, 1,4-dioxane-2,5-dione and 2-oxepanone 1,4-Dioxane-2,5-dione, 3,6-dimethyl-, polymer with 1,4-dioxane-2,5-dione, 1,3-dioxan-2-one and 2-oxepanone 1,4-Dioxane-2,5-dione, polymer with 3,6-dimethyl-1,4-dioxane-2,5-dione, 1,3-dioxan-2-one and 2-oxepanone 2-Oxepanone, polymer with 3,6-dimethyl-1,4-dioxane-2,5-dione, 1,4-dioxane-2,5-dione and 1,3-dioxan-2-one Caprolactone-glycolide-lactide-trimethylene carbonate copolymer Caprolactone-trimethylene carbonate-glycolide-lactide copolymer Glycolide-trimethylene carbonate-caprolactone-lactide copolymer Polyglytone 6211 ε-Caprolactone-glycolide-lactide-trimethylene carbonate copolymer