Tannins
Cassia fistula leaves contain phenolic compounds and condensed tannins. High total phenolic compound (44 g/kg DM) and condensed tannin (32 g/kg DM) contents have been reported in a semi-arid region (Egypt) (Salem et al., 2006) whereas lower values (11-12 g/kg DM) were found in a tropical humid region (Mauritius) (Luximon-Ramma et al., 2002).