A new pregnane glycoside and oligosaccharide from Parabarium huaitingii

Abstract

Two new compounds, along with two known compounds, were isolated from the barks of Parabarium huaitingii, and their structures were determined as 5α-pregn-6-ene-3β,17α,20(S)-triol-20-O-β-d-digitoxopyranoside (1), cymaropyranurolactone 4-O-β-d-digitalopyranosyl-(1 → 4)-O-β-d-cymaropyranosyl-(1 → 4)-O-β-d-oleandropyranosyl-(1 → 4)-O-β-d-cymaropyranoside (2), 3β,17α,20(S)-trihydroxy-5α-pregn-6-ene (3), and 5α-pregn-6-ene-3β,17α,20(S)-triol-3-O-β-d-digitalopyranoside (4) by spectroscopic methods.

Keywords:

• Apocynaceae
• Parabarium huaitingii
• pregnane glycoside
• oligosaccharide

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 21310104) and Natural Science Foundation of Guangdong Province, China (No. 32210018).