Phenylpropanoids with Anti-Inflammatory Effects from the Roots of Platycodon grandiflorus.

Two new phenylpropanoids, plagnans (1) and plaganoid (2), along with five known phenylpropanoids, including an enantiomeric mixture (compound 3) were isolated from the roots of Platycodon grandiflorus. Meanwhile, their structures were elucidated by analyzing the spectroscopic data, including NMR, HR-ESI-MS, ECD (ICD), and X-ray analysis. Although all isolates were evaluated for their anti-inflammatory activities, and of them exhibited moderate activities, with IC₅₀ values of around 27.5 μM. [ABSTRACT FROM AUTHOR]