Secondary metabolites from Sambucus ebulus

A new nonglycosidic iridoid, sambulin B (1), was isolated from the methanol extract of Sambucus ebulus L. leaves along with a recently reported new nonglycosidic iridoid, 10- O -acetylpatrinoside aglycone (sambulin A) (2); 2 flavonoids, isorhamnetin-3- O - β -D-glucopyranoside (3) and isorhamnetin-3- O -rutinoside (4); and a mixture of 2 flavonoids (5), quercetin-3- O - β -D-glucopyranoside and quercetin-3- O - β -D-galactopyranoside. Their structures were elucidated by 1-D and 2-D nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MS) experiments.