P. Timmerman et al., SYNTHETIC RECEPTORS WITH PREORGANIZED CAVITIES THAT COMPLEX PREDNISOLONE-21-ACETATE, Journal of the Chemical Society, Chemical Communications, (4), 1995, pp. 417-418
Receptors 3a-c composed of two upper rim 1,2-difunctionalized calix[4]
arene fragments, oriented either endo or exo, and one bridging cavitan
d unit, complex prednisolone-21-acetate with association constants of
4.3-8.3 x 10(2) dm(3) mol(-1) in CDCl3.