The title compounds, MBH (C14H16N+.Cl-) and EBH (C15H18N+.Cl-), respec
tively, act as inhibitors of smooth-muscle spasms. Both compounds crys
tallize in enantiomorphous space groups, but EBH presents two crystall
ographically inequivalent enantiomers. In both cases, the molecular co
nformation can be classified as deformed helical C,. Both compounds fo
rm infinite chains along b through two types of N-H ... Cl bond.