Correction to "Rubriflordilactones A and B, Two Novel Bisnortriterpenoids from Schisandra rubriflora and Their Biological Activities". - Xiao WL; Yang LM; Gong NB; Wu L; Wang RR; Pu JX; Li XL; Huang SX; Zheng YT; Li RT; Lu Y; Zheng QT; et al. (Organic letters, 2021)