99.  Cadmium-containing windmill-like heteropolyoxoniobate macrocycle with high yield for catalyzing Knoevenagel condensation.

Z.Y. Liu, J.P. Ye, Y.L. Li, Y.Q. Sun, X.X. Li, C. Sun,* S.T. Zheng,*. Dalton Trans., 2023, 52, 1193-1197.