Figure 5
From: Computer-assisted methods for molecular structure elucidation: realizing a spectroscopist's dream
Example of a structure and its Molecular Connectivity Diagram of HMBC connectivities. In the structure, the HMBC connectivities are shown by arrows. It is seen that 131.6-18.0 and 36.9–131.8 connectivities are nonstandard (extending out above 3 bond correlations).