Complete 1 H and 13 C NMR assignments of an uncommon 2,3-dihydroxynaphthoquinone isolated from Cordia multispicata (Cham.). - da Silva AKO; Pinto FDCL; Canuto KM; Torres MDCM; Loiola MIB; Silveira ER; Pessoa ODL (Magnetic resonance in chemistry : MRC, 2017)