The present paper describes the comparison of ^(13)C-^(13)C connectivity data of COSY, HMBC, TOCSY and HMQC-TOCSY NMR spectra for structure generation by ID number method. The results demonstrated that, in addition to α-connectivity, TOCSY could provide β-connectivities for ID number method while the connectivities derived from HMQC-TOCSY was less than that of HMBC or TOCSY. Hence, it is suggested that for ID number method, COSY and HMBC are essentially required for the method and we may complementarily determined TOCSY for increasing connectivity data. The comparison for different magnetic field showed that there was no remarkable difference in connectivity. The solvent effect on the 2 D NMR spectra determined was significant, suggesting that solvent selection for spectra determination is very critical.