Spirosalen–scandium catalysts enable the epimerization-tolerant closed-loop circularity of poly(l-lactic acid). - Huang, Yu-Ting; Huang, Hao-Yi; Xie, Min; Cui, Jia-Hao; Wu, Zhi-Jie; Yu, Da-Gang; Xiang, Haifeng; Cai, Zhongzheng; Zhu, Jian-Bo (National Science Review, 2025)