Verticillosides A-M: Polyoxygenated pregnane glycosides from Asclepias verticillata L.

► Verticillosides A-M, 13 pregnane glycosides, were isolated from Asclepias verticillata L. ► 800 MHz NMR experiments and X-ray crystallography were employed for structure elucidation. ► Isolates did not show significant cytotoxicity against breast cancer cell line Hs578T.