import omero
compounds = unwrap(q.projection(("select distinct mv1.value, mv2.value from Image i "
                           "join i.annotationLinks l1 join l1.child as a1 join a1.mapValue as mv1 "
                           "join i.annotationLinks l2 join l2.child as a2 join a2.mapValue as mv2 "
              "join i.wellSamples ws join ws.well w join w.plate p "
              "where p.id = 4403 and mv1.name = 'Product Use Annotation' and mv2.name = 'Compound Name'"), None))