Further peaks, e.g. m/z 987.5 or m/z
1113.5 were also detected with low intensity. Those are di-sodium
adducts [M + 2Na − H]+ of the same compounds. However, the band
below (Fig. 2A, lanes 6–17, lower gray band) corresponded to saponin
B (m/z 965.5 [M + Na]+, Fig. 3B).