6-Hydroxy-5,6-seco-stemocurtisine: A novel seco-stemocurtisine-type alkaloid

- The first Stemona alkaloid with a seco-pyrido[1,2-a]azepine structure is reported.
- The structure was elucidated using spectroscopic and X-ray crystallographic analysis.
- Biosynthesis proposed by azepine ring cleavage of co-isolated stemocurtisine.