195256-69-0 2',2',5,7-Tetramethyl-6-oxospiro(1,3-diazaadamantane-2,4'-tetrahydrothiopyrane) Spiro(1,3)diazatricyclo(3.3.1.1(sup 3,7))decane-2,4'-(4H)thiopyran)-6-one, tetrahydro-2',2',5,7-tetramethyl-