The crystal structure of doxylamine hydrogen succinate or dimethyl{[1-pheny
l-1-(2-pyridyl)ethoxy]ethyl]ammonium hydrogen succinate, C17H23N2O+.C4H5O4-
, contains two independent protonated molecules of doxylamine with differen
t conformations and two succinate anions in an asymmetric unit. The structu
re is stabilized by hydrogen bonds involving the cations and the anions, wi
th O . . .O and N . . .O distances in the range 2.536 (5)-2.853 (5) Angstro
m.