Iridoid glycosides from the stems of Pithecoctenium crucigerum (Bignoniaceae)

The chemical investigation of the methanol extract from the stems of Pithecoctenium crucigerum afforded theviridoside 1, three derivatives (6′-O-cyclopropanoyltheviridoside 2, 10-O-hydroxybenzoyltheviridoside 3, 10-O-vanilloyltheviridoside 4) along with five known phenylethanoid glycosides.