英文别名3-Benzyloxy-4-oxo-4H-pyran-2-carboxylic acid methyl ester; methyl 4-oxo-3-phenylmethoxypyran-2-carboxylate; methyl 3-benzyloxy-4-oxo-pyran-2-carboxylate; 4H-Pyran-2-carboxylic acid, 4-oxo-3-(phenylmethoxy)-, methyl ester; 3-(benzyloxy)-4-oxo-4H-pyran-2-carboxylate; Baloxavir Impurity 61; Baloxavir Marboxil Impurity 61 
