A new 2-arylbenzofuran from twigs of Cassia alata and its cytotoxicity EMISSIONS OF SOIL GREENHOUSE GASES IN RESPONSE TO UNDERSTORY REMOVAL AND CASSIA ALATA ADDITION IN AN EUCALYPTUS UROPHYLLA PLANTATION IN GUANGDONG PROVINCE, CHINA Soil greenhouse gases emission from an Acacia crassicarpa plantation under effects of understory removal and Cassia alata addition. Studies on chemical constituents from leaves of Cassia alata A new furan-2-carboxylic acid from stem bark of Cassia alata