1,3-Diazatricyclo(3.3.1.1(sup 3,7))decan-6-one, 5,7-dimethyl-2-ethyl- 108790-71-2 5,7-Dimethyl-2-ethyl-1,3-diazatricyclo(3.3.1.1(sup 3,7))decan-6-one