2H-1,4-Benzoxazin-3(4H)-one, hexahydro-8a-phenyl-, trans- 89263-12-7 trans-1-Phenyl-2-oxa-5-azabicyclo(4.4.0)decan-4-one trans-Hexahydro-8a-phenyl-2H-1,4-benzoxazin-3(4H)-one