Mirabegron223673-61-8100 % similar (R)-2-[2-(4-Aminophenyl)ethylamino]-1-phenylethanol hydrochloride521284-22-043 % similar 2-Amino-4-thiazoleacetic acid29676-71-937 % similar Ethyl 2-amino-4-thiazoleacetate53266-94-732 % similar