Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The design, synthesis, and structure activity relationships of a series of novel macrocyclic FKBP-12 ligands 1 are reported. The crystal structure of the complex between 7 and human FKBP-12 is reported and some SAR results are discussed based on this complex.