105124-63-8 Benzo(6,7)cyclohept(1,2-b)-1,4-oxazine, 2,3,4,4a,5,6,7,11b-octahydro-4-acetyl-, trans- trans-2,3,4,4a,5,6,7,11b-Octahydro-4-acetylbenzo(6,7)cyclohept(1,2-b)-1,4-oxazine