Croblongifolin, a New Anticancer Clerodane from Croton oblongifolius - Roengsumran, Sophon; Musikul, Kusalin; Petsom, Amorn; Vilaivan, Tirayut; Sangvanich, Polkit; Pornpakakul, Surachai; Puthong, Songchan; Chaichantipyuth, Chaiyo; Jaiboon, Nongnuj; Chaichit, Narongsak (Planta Medica, 2002)