Synonyms: Butyrophenone, 4-(5-ethyl-2-methyl-1,3-dioxa-9-azaspiro(5.5)undec-9-yl)-4'-fluoro-, oxalate;1,3-Dioxa-9-azaspiro(5.5)undecane, 5-ethyl-9-(3-(p-fluorobenzoyl)propyl)-2-methyl-, oxalate;Methyl-2 ethyl-5 (fluoro-4'-benzoyl)-3 propyl-9 dioxa-1,3 aza-9 spiro(5.5)undecane oxalate;AC1L2BX4;LS-48355;4-(7-ethyl-10-methyl-9,11-dioxa-3-azoniaspiro[5.5]undecan-3-yl)-1-(4-fluorophenyl)butan-1-one; 2-hydroxy-2-oxoacetate;63377-12-8