1-Oxa-3,9-diazaspiro(5.5)undecan-2-one, 9-(3-(p-chlorobenzoyl)propyl)-5-methyl- 54981-20-3 BRN 0565341 Oxo-2 methyl-5 ((chloro-4 benzoyl)-3 propyl)-9 oxadiaza-1,3,9 spiro(5,5)undecane [French]