Phenylpropanoid and iridoid glycosides from Pedicularis longiflora

Abstract

From an ethanolic extract of whole plants of Pedicularis longiflora, two new compounds, pedicularioside I and longifloroside, were isolated along with six known compounds, cistanoside D, cistanoside C, verbascoside, geniposidic acid, mussaenoside and loganic acid. On the basis of spectral and chemical evidence, pedicularioside I and longifloroside were determined to be 1′-O-β-d-(3-methoxy-4-hydroxy-phenyl)-ethyl-α-l-rhamnosyl-(1 → 3′)-α-l-arabinosyl-(1 → 4′)-6′-O-feruloyl-glucopyranoside and 5″-O-(4′-aucubinyl)-5‴-O-(4′-euphrosidyl)-(2″,2‴)-2,5H-furan ether(bis-iridoid glucoside), respectively.