“…Many alkaloids, nucleotides, steroids, peptides, antibiotics and vitamins [6e10] comprise Mannich base fragments. Bioactivity, such as antioxidative [11], antifungal [12], antiinflammatory [13], antimalarial [14], vasorelaxing [15], antitubercular [16], analgesic [17], anticancer [18e21], etc., is a common feature of this class of compounds. Recently, the details on the synthesis and biological activity of some Mannich bases were reported [22].…”