Fig. 6From: Nuclear magnetic resonance assignment strategy for pentacyclic triterpenes, using lup-20(29)-ene from Pilotrichella flexilis as model system, combining spectrally filtered proton-to-carbon schemes and DFT–GIAO approachExperimental and calculated 1H (top) and 13C (bottom) chemical shift correlation for respectively all 50 protons and 30 carbons of lup-20(29)-ene, showing the agreement between the experimental shifts and the GIAO NMR data computed from the optimized electronic structure, carried out with DFT approachBack to article page