2H-1,3-oxazine, tetrahydro-4,4,6,6-tetramethyl- 4,4,6,6-tetramethyl-1,3-oxazinane InChI=1/C8H17NO/c1-7(2)5-8(3,4)10-6-9-7/h9H,5-6H2,1-4H