Cytotoxic constituents from the stem bark off Dichapetalum gelonioides collected in the Philippines - Fang, LQ; Ito, A; Chai, HB; Mi, QW; Jones, WP; Madulid, DR; Oliveros, MB; Gao, Q; Orjala, J; Farnsworth, NR; Soejarto, DD; Cordell, GA; et al. (JOURNAL OF NATURAL PRODUCTS, 2006)