Mirabegron Impurity 53

Ethyl 2-(2-aminothiazol-4-yl)acetate; 4-Thiazoleacetic acid, 2-amino-, ethyl ester; (2-Amino-4-thiazolyl)
acetic acid ethyl ester; 2-Amino-4-(ethoxycarbonylmethyl)-1,3-thiazole; Ethyl (2-amino-1,3-thiazol-4-yl)acetate;