156454-78-3 2,3-Dihydro-2-(4-morpholinyl)-4H-1,3,2-benzoxazaphosphorin-4-one 2-oxide 2-Morpholino-2,3-dihydro-1,3,2-benzoxazaphosphorin-4-one 2-oxide 4H-1,3,2-Benzoxazaphosphorin-4-one, 2,3-dihydro-2-(4-morpholinyl)-, 2-oxide