Correction: Pentacyclic spermidine alkaloids with radioprotective and anti-inflammatory activities from .

Correction for 'Pentacyclic spermidine alkaloids with radioprotective and anti-inflammatory activities from ' by Zan-Xin Xu , , 2021, , 9844-9848, DOI: 10.1039/D1OB01973B.

Pentacyclic spermidine alkaloids with radioprotective and anti-inflammatory activities from .

Two pairs of novel pentacyclic spermidine alkaloid enantiomers, (±)-orychoviolines A and B ((±)-1 and (±)-2), were isolated from the seeds of and represented the first example of a 2-piperidinone-fused hydrodibenzofuran skeleton, constructed from a 6/5/6/6 tetracyclic system and an 18 atomic ring. The most unexpected novelty was the formation of one more piperidinone ring by a connection between C-6 and N-7. Their structures and absolute configurations were determined by spectroscopic analyses, X-ray crystallography, and ECD analysis.