New bioactive cyclopeptide alkaloids with rare terminal unit from the root bark of<i>Ziziphus cambodiana</i>

Abstract

Six new 14-membered ring cyclopeptide alkaloids, cambodines A–F (<bold>1–6</bold>), and two known compounds, frangufoline (<bold>7</bold>) and lotusanine B (<bold>8</bold>), were isolated from the root bark extract of<italic>Ziziphus cambodiana</italic>Pierre.