Chiral guanidine-functionalized chloramphenicol base: a novel ultra-low-loading bifunctional organocatalyst for highly enantioselective alcoholysis of meso-cyclic anhydride. - Xiong, Fei; Jiang, Huifang; Chen, Jiawei; Gong, Yi; Zhang, Zhenyu; Xia, Heping (Research on Chemical Intermediates, 2025)