[摘要]：One new anthraquinone glycoside. 6-O-(alpha-L-rhamnopyranosyl (1 -> 6)-beta-D-glucopyranosyl)emodin (1). and two new sesquilignans. seslignanoccidentaliols A (2) and B (3), were isolated from the whole plant of Cassia occidentalis. The structures of the new compounds were established by means of spectroscopic methods, especially 2D-NMR data (H-1.H-1-COSY. HMQC, HMBC. and ROESY). as well as HR-ESI-MS analysis. One previously reported sesquilignan. crythro-guaiacylglycerol-beta-O-4'-(5')-methoxylariciresinol, was revised to be seslignanoccidentaliol A (2). The 6-O-(alpha-L-rhamnopyranosyl(1 -> 6)-beta-D-glucopyranosyl)emodin (1) exhibited moderate anti HIV-1 activity with an EC50 value of 2.90 mu g/ml and a therapeutic-index (TI) value of 260.
