1-Oxa-3,8-diazaspiro(4.5)decan-2-one, 8-(4,4-bis(4-fluorophenyl)butyl)-4-methylene-3-phenyl- 134069-75-3 8-(4,4-Bis(4-fluorophenyl)butyl)-4-methylene-3-phenyl-1-oxa-3,8-diazaspiro(4.5)decan-2-one