\BOOKMARK [1][-]{section.1}{1. A motivic version of a theorem by Conner and Floyd}{} \BOOKMARK [1][-]{section.2}{2. Preliminaries}{} \BOOKMARK [1][-]{section.3}{3. The first Pontryagin class p\1371\(E,phi\)}{} \BOOKMARK [1][-]{section.4}{4. Symplectically oriented commutative ring T-spectra}{} \BOOKMARK [1][-]{section.5}{5. Where the class p\1371 takes the place of honour}{} \BOOKMARK [1][-]{section.6}{6. Last details}{} \BOOKMARK [1][-]{section*.1}{References}{}