Technological method of catalytic synthesizing medical biodegradable material with biomass organic guanidine compound

A process for catalytically synthesizing the medical biodegradable material features that the non-toxic non-metal biologic organic guanidine compound (bio-GD), such as creatine, creatinine, and guanidinoacetic acid, is used as catalyst for the open-loop polymerizing reaction of cycloester monomers (L-lactide, glycolide, etc). Its advantage is no environmental pollution.