1. Thevetia peruviana contains cardiac glycosides, with thevetin as the main cardenolide triglycoside (a mixture of thevetin A and B). Droplet counter-current chromatography (DCCC) was used to separate crude thevetin: a Model A DCC apparatus with 300 tubes, mobile phase as the more polar layer of CHCl3-MeOH-H2O (35:65:45) (ascending mode, 10 mL/h flow rate). Crude thevetin (0.25 g) yielded thevetin B (0.15 g, eluted first) and thevetin A (0.08 g), crystallized from water. Their mps and spectra matched literature reports. 2. In a continuation of alkaloid studies on New Caledonian Sarcomelicope (Rutaceae), the alkaloidal constituents of Sarcomelicope argyrophylla stem bark and leaves were reported. Leaves yielded furoquinoline acronydine (0.02% dry weight) and benzamide (0.01%). Stem bark yielded seven alkaloids: three furoquinolines (acronydine, dictamnine, evolitrine) and four acridones (melicopicine, melicopidine, 1,2,3-trimethoxy-10-methylacridan-9-one, acronycine). Major bark alkaloids are acridones, consistent with other Sarcomelicope species, supporting Hartley's botanical revision. 3. Previous study on Diospyros discolor stem bark found a new tannin and anthraquinone glycoside; further examination revealed a new anthraquinone glycoside, assigned as 1,3,5-trihydroxy-6-methoxy-2-methyl anthraquinone 8-O-β-D-glucopyranoside via spectral (1H-NMR, UV, IR) and chemical evidence. The compound (C22H22O12, m.p. 255-256°C) gave positive Borntrager and Molisch's tests, formed a heptaacetate (m.p. 130-132°C dec.). Acid hydrolysis yielded D-glucose and aglycone (C16H12O7, m.p. 150-153°C dec.), with functional groups confirmed by derivative preparation and tests.