Dear all, I'm trying to use create a synthetic peaklist for a 4D H[C]_H[C].through-space spectrum based on the structure. I noticed that ccpn generates the list but only about 50% of the synthetic peaks have an assignment. How can that be? To predict a peak based on the structure ccpn must look up the shifts for the atoms that are in spatial proximity and should then just assign the peak to those atoms. Matthias