Synthesis of an receptor containing chiral bicyclic guanidine for amino acids .
含手性双环胍的氨基酸受体的合成。
Synthesis and catalytic activities of bicyclic chiral ammonium salt phase-transfer catalysts based on natural amino acids .
基于天然氨基酸的双环手性季铵盐相转移催化剂的合成及催化性能研究。
Different types of metal ion complexants include acyclic ( podand ) , cyclic ( crown ether , calixarene ) , and bicyclic ( calix-crown , cryptand ) ligands .
