Lantanocamarolide, a new pentacyclic triterpenoid from roots of <i>Lantana camara</i> Linn. and its nematicidal activity against <i>Meloidogyne incognita</i>

A new triterterpenoid, lantanocamarolide (3-oxo-12<i>α</i>-hydroxyolean-22<i>β</i>-[<i>β,β-</i>dimethylacryloyloxy]-13<i>β</i>-28-olide; (<b>1</b>) and five reported compounds, oleanolic acid (<b>2</b>), lantanilic acid (<b>3</b>), camaric acid (<b>4</b>), camarinic acid (<b>5</b>) and oleanonic acid (<b>6</b>) were isolated from the methanolic extract of <i>Lantana camara</i> roots. Mass spectrometry, 1D and 2D NMR spectroscopic techniques were used to elucidate the structure of new compound. Compound <b>1</b> was also screened for nematicidal activity against root-knot nematode (<i>Meloidogyne incognita</i>). The possible effectiveness of compound <b>1</b> in nematicidal control is evaluated as it exhibited 91% inhibition after 72 h at 0.125% concentration.