“…All these derivatives were found to be among the most powerful ATX inhibitors (both in vitro and ex vivo in human whole blood) reported to date in the literature. Recently, ONO Pharmaceutical introduced the tetrahydrocarboline-based inhibitor ONO-8430506, with IC 50 values of 5.1 nM and 4.5 nM in the FS-3 and LPC assay, respectively [ 52 , 53 ]. Other ATX inhibitors that have been developed include the pipemidic acid-based molecule H2L-7905958 ( Figure 1 ) [ 54 , 55 ], various antioxidants, such as polyphenols and phenolic acids [ 56 ], benzene-sulfonamide-based derivatives (I, Figure 1 ) [ 31 , 57 ], indole-thioether carboxylic acid derivatives (II, Figure 1 ) (Inc. 2012), pyridazines (III, Figure 1 ) and tetrahydropyridopyrimidine derivatives [ 58 , 59 ], as well as benzoxazolone or benzotriazole- [ 60 ], imidazole- [ 61 ] and benzonaphthyridinamine-based analogues [ 62 , 63 ].…”