Angiogenesis Inhibitors - pharmacology, Sphingosine - analogs & derivatives, Sphingosine - pharmacology, Angiogenesis Inhibitors - chemistry, Sphingosine - chemistry, Sphingosine - chemical synthesis, Chorioallantoic Membrane - drug effects, Alkynes - pharmacology, Chorioallantoic Membrane - blood supply, Angiogenesis Inhibitors - chemical synthesis, Propyle...