英文别名Ethyl-2-(2-morpholinocyclopent-2-en-1-ylidene)acetate; Acetic acid, 2-[2-(4-morpholinyl)-2-cyclopenten-1-ylidene]-, ethyl ester; ETHYL 2-((2-MORPHOLIN-4-YL)CYCLOPENT-2-EN-1-YLIDENE)ACETATE; ethyl 2-(2-morpholinocyclopent-2-enylidene)acetate; Etrasimod Impurity 8 
