Two new triterpenoids from the resin of Styrax tonkinensis

Abstract

Two new triterpenoids, 3β,6β-dihydroxy-12-oxo-13Hα-olean-28,19β-olide (1) and 3-oxo-olean-11,13(18)-dien-28,19β-olide (2) were isolated from the resin of Styrax tonkinensis (Pier.) Craib. The structures of both triterpenoids were determined by physicochemical and spectroscopic methods. Compound 1 is the second triterpene found with cis-fused C/D ring from the resin, which is rarely observed in oleanane-type triterpenes.

Keywords::

• triterpenoids
• Styrax tonkinensis
• 3β,6β-dihydroxy-12-oxo-13Hα-olean-28,19β-olide
• 3-oxo-olean-11,13(18)-dien-28,19β-olide

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the National Natural Science Foundation of China [81202884].