Martha, Rahma Diyan, et al. “Synthesis of Curcumin Derivatives (2.5-Bis((E)-4-Hydroxy-3-Methoxy Benzylidine) Cyclopenta-1-On) from Vanillin and Its Activity Test Against Α-Glucosidase Enzymes”. Walisongo Journal of Chemistry, vol. 5, no. 1, July 2022, pp. 1-9, doi:10.21580/wjc.v5i1.8905.