Compounds of formula (I) especially where R
1
is an optionally substituted alkyl, aralkyl or heterocyclyl-alkyl group, are shown to have activity as sodium channel blockers or as antifolates. Some novel compounds where R
1
is an aralkyl or hetero-cyclyl-alkyl are disclosed.
Compounds of formula (I):
especially where R
1
is an optionally substituted alkyl, aralkyl or heterocyclyl-alkyl group, are shown to have activity as sodium channel blockers or as antifolates. Some novel compounds where R
1
is an aralkyl or heterocyclyl-alkyl are disclosed.