2h-pyran-6-carboxylic

3005-94-5

2H-Pyran-6-carboxylic acid, 3-(bromomethyl)-2-oxo-, ethyl ester

103692-94-0

2H-Pyran-6-carboxylic acid,4-[3-methoxy-3-oxo-2-[(trifluoroacetyl)amino]-1-propenyl]-2-oxo-, methylester, (E)-