The design, synthesis and evaluation of N, N′, N′′-tris (2-pyridylmethyl)-cis, cis-1, 3, 5,- triaminocyclohexane (tachpyr, 1) derivatives as novel anti-angiogenic agents were performed in an in vitro endothelial cell proliferation assay to assess their cytotoxicity and selectivity. The selective nature of the anti-angiogenic agents for human umbilical vein endothelial cells (Huvec) was compared to a normal fibroblast cell line and a human ...