H-1 and C-13 NMR data for six phenothiazine derivatives are reported. Spectral assignments were made on the basis of two-dimensional homonuclear. H-1,H-1 and heteronuclear H-1,C-13 correlation techniques (COSY, COSY-LR, HETCOR, COLOC) and C-13,H-1 coupling constant measurements.