Fig. 1: Schematic illustration of molecular synthesis.

Synthesis of dehydroabietic acid-derived Schiff bases: a EtOH, 90 °C, 10 h; b EtOH, 100 °C, over night; c EtOH, 85 °C, 3 h.
Synthesis of dehydroabietic acid-derived Schiff bases: a EtOH, 90 °C, 10 h; b EtOH, 100 °C, over night; c EtOH, 85 °C, 3 h.