The present invention includes photocurable, liquid polymers incorporating coumarin ester endgroups into their molecular structure, which polymers are crosslinked upon irradiation with ultraviolet light by photochemically allowed [2+2] cycloaddition reactions among the chain ends, and which crosslinked...http://www.google.es/patents/US7012126?utm_source=gb-gplus-sharePatente US7012126 - Coumarin endcapped absorbable polymers
