And if it is structure (5), H1 and H7 should appear in high field (about δ3.0 instead of δ6.5), the coupling constant of cis Hb and H1 should be greater than the coupling constant of trans Ha and H1.
For structure (5), H1 and H7 should appear in the high field (about δ 3.0 instead of δ 6.5), and the coupling constant of CIS Hb and H1 should be greater than that of trans HA and H1.<br>