英文同义词:
PBT Impurity 3;cyclo-Tetrakis-tetramethylenterephthalat;Cyclotetrakis;Cyclotetrakis(1,4-butylene Terephthalate);3,8,12,17,21,26,30,35-octaoxa-1,10,19,28(1,4)-tetrabenzenacyclohexatriacontaphan-2,9,11,18,20,27,29,36-octaone;butyleneterephthalatecyclictetramer