3-Ethyl-5-(4-fluorophenyl)-6,8-dioxa-3-azabicyclo(3.2.1)octane (Z)-2-butenedioate (1:1) 6,8-Dioxa-3-azabicyclo(3.2.1)octane, 3-ethyl-5-(4-fluorophenyl)-, (Z)-2-butenedioate (1:1) 84523-14-8