DB293 is an inhibitor of PIT-1 and BRN-3 transcription factors. DB293 binds as head-to-tail stacked dimers in the minor groove of 5'-ATGA sequence, thereby leading to an increase in the size of minor groove.
Alniditan is a receptors agonist of 5-HT1B/1D in HEK 293 cells (IC50: 1.7 and 1.3 nM). For 5-HT1B/1D receptors, the pKi values are 8.96 and 9.40, respectively.