Synonym
;(E)-4-Ethoxy-4-oxo-2-butenoic Acid|(2E)-2-Butenedioic Acid 1-Ethyl Ester|(2E)-2-Butenedioic Acid Monoethyl Ester|(E)-4-Ethoxy-4-oxobut-2-enoic acid|Ethyl Hydrogen Fumarate|Fumaric Acid Ethyl Ester|Fumaric Acid Monoethyl Ester|Fumaric Acid Monoethyl Ester ; (E)-4-Ethoxy-4-oxobut-2-enoic acid ;|Monoethyl Fumarate|Monoethyl Fumarate (Quetiapine Impurity R)|Monoethyl trans-2-Butenedioate;