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Fig. 2 | Applied Biological Chemistry

Fig. 2

From: 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 approach

Fig. 2

Full assignment of lup-20(29)-ene 13C NMR resonances shown within an overlay between a 13C-direct excitation semi-quantitative experiment and a DEPT-13C spectrum, wherein the later was used to disentangle all lupene’s carbon spin systems. Relative integration of all 13C resonances was done with respect the vinylic CH2 (29) resonance

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