From the stem part of Caesalpinia pulcherrima Swartz (Leguminosae) two new peltogynoids, pulcherrimin and 6methoxypulcherrimin and two homoisoflavonoids, the recently reported compound bonducellin and a new derivative %methoxy-bonducellin, were isolated. The structures of these constituents were deduced by consideration of their spectral data. Also isolated were the known compounds, 2,6-dimethoxybenzoquinone and 4'-methylisoliquiritigenin, which displayed cytotoxic activity.