195256-71-4 5,7-Dimethyl-6-oxospiro(1,3-diazaadamantane-2,2'-adamantane) Spiro(1,3-diazatricyclo(3.3.1.1(sup 3,7))decane-2,2'-tricyclo(3.3.1.1(sup 3,7))decan)-6-one, 5,7-dimethyl-