... of Biheteroaromatic Compounds via the Isoxazoline Route Sami S. Ghabrial,* I. Thomsen and KBG Torssell Department of Organic Chemistry, Chemical institute, University ... Acta Chem. Scand. ... 426 Acta Chemica Scandinavica B41 (1987) 426—434 (1) H XR X = O. NCOCH3 ...