英文同义词:
1,4-Butanediol-terephthaloyl Chloride Cyclic DiMer;3,8,15,20-Tetraoxatricyclo[20.2.2.210,13]octacosa-10,12,22,24,25,27-hexaene-2,9,14,21-tetrone;Cyclobis(1,4-butylene terephthalate);PBT Cyclic DiMer;Pharacin;Pharacine;3,8,15,20-Tetraoxatricyclo[20.2.2.210,13]octacosa-1(24),10,12,22,25,27-hexaene-2,9,14,21-tetrone;PBT Impurity 1