Starting with the hydrogen atoms in group (D), the phenyl ring, the 1H-NMR correlates almost exclusively with this structure. The atoms there experience a chemical shift in the range of 7.33-7.28 ppm; the predicted phenyl hydrogen shift is between 6.0 and 8.8 ppm. The experimental chemical shift states that five hydrogens exist in that particular multiplet and they fit neatly into the phenyl ring range. This allows for the proof of the phenyl ring's existence in the structure of the molecule. There being no phenyl ring on the compound from with (+)-78 was prepared distinguishes this substance immediately from its origins.
Moving next to the hydrogens of group (E), the given shift is one of size 4.52 ppm. The structure of that region is similar to that of a compilation of ArCH3 (2.3 ppm) and of RNHCH3 (2-3 ppm). The combination of the two types of groups work to further deshield the hydrogens of group (E) and create a shift that is farther downfield than either of the two, namely the shift at 4.52 ppm. Hydrogen group (F) correlates with the nitrogen because it is greatly deshielded by the nitrogen electronegativity in addition to the slight deshielding effect of the carbonyl and phenyl groups, these effects give it the highest chemical shift.
The next sets of hydrogen groups (J,G) are very close together. This is because they are in essentially the same environment except for the groups that are spatially close to them. This causes group (G) to be slighted more deshielded by the carbonyl group and nitrogen's electronegativity. This is the same theory behind the groups (H,I).
The lowest shift is given to they hydrogens (A,C) because they are on a carbon chain which has almost no deshielding effects. The difference in chemical shifts can be attributed to the rotation of the sigma bond. The final chemical shift is the hydrogen group (B). It is slightly more deshielded than the previous groups because of it's bonding with the oxygen atom.