. 2019 Jun 5;7:407. doi: 10.3389/fchem.2019.00407
Copyright © 2019 Alfieri, Panzella, Oscurato, Salvatore, Avolio, Errico, Maddalena, Napolitano, Ball and d'Ischia.
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Figure 7.
13C and 15N NMR spectra of PDA obtained in presence and in absence of the diamine (HMDA).