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In this work we describe a systematic and comparative study of the 17 O NMR and related parameters of 17 polycyclic compounds: bicyclic, tricyclic, tetracyclic (endo-endo and endo-exo fusion), pentacyclic compounds (ketone; endo and exo-alcohols), hexacyclic alcohol. Concentration, temperature and solvent effects on the 17 O NMR chemical shifts and the relaxation rate are...