4-Oxo-4H-1-benzopyran-2-carboxylic acid 2-(diethylamino)ethyl ester hydrochloride 4H-1-Benzopyran-2-carboxylic acid, 4-oxo-, 2-(diethylamino)ethyl ester, hydrochloride Chromone-2-carboxylic acid beta-diethylaminoethyl ester hydrochloride DJ2495010