1,3,8-Triazaspiro(4.5)decane-2,4-dione, 1,3-dimethyl-8-(3-(p-fluorobenzoyl)propyl)- 1,3-Dimethyl-8-(4-fluorobenzoylpropyl)-2,4-dioxo-1,3,8-triazaspiro(4.5)decane 102395-36-8