英文别名Di-2-thienylglycolic Acid; dithienylglycolic acid; dithienyl-hydroxyacetic acid; hydroxy-di-thiophen-2-yl-acetic acid; 2-Hydroxy-2,2-Bis(2-Thienyl) Acetic Acid; Tiotropium Bromide Impurity 1; 2-hydroxy-2,2-dithiophen-2-ylacetic acid; Aclidinium Impurity 3; 2-Thiopheneacetic acid, α-hydroxy-α-2-thienyl- 
