1. State Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Functional Polymer Materials of Ministry of EducationCollege of ChemistryNankai University Tianjin 300071 China
2. Tianjin Neurological InstituteKey Laboratory of Post‐Neurotrauma Neuro‐Repair and Regeneration in Central Nervous SystemMinistry of Education and Tianjin CityDepartment of NeurosurgeryTianjin Medical University General Hospital Tianjin 300052 China