HNMR of allicin produces a complex spectrum in which the protons next to sulfur can´t be differentiated even with high resolution devices. Bidimensional COSY spectrum gives some more information
Perhaps the most useful technique is 13 C. in the polarization transfer modality. DEPT 135, allows an inambiguous characterization of each of six carbon atoms of the allicin
Spectra made at the Faculty of Pharmacy of Sevilla by J. Galbis and M. A. Garrido.