The present invention provides a morpholine derivative of the formula [I];
wherein R
1
is a substituted alkyl group, an optionally substituted aryl group, an optionally substituted heterocyclo group, a cycloalkyl group or an alkyl group; R
2
is a substituted alkyl group, an optionally substituted aryl group, an optionally substituted heterocyclo group, an optionally substituted alkylcarbonyl group, an optionally substituted arylcarbonyl group, an optionally substituted heterocyclo-substituted carbonyl group or a cycloalkylcarbonyl group; T is a methylene group or a carbonyl group; R
3
, R
4
, R
5
and R
6
are the same or different and a hydrogen atom, an optionally substituted carbamoyl group or an optionally substituted alkyl group;
or pharmaceutically acceptable salts thereof.
These compounds are useful as a renin inhibitor.
Oxazolo[4,5-b]pyridine substituted in the 2-position with a polyhydrobicycloaryl group are topical anti-inflammatory agents. They are prepared by condensing a 2-amino-3-hydroxypyridine with the appropriate carboxylic compound.