with oxygen atoms directly attached to the aromatic ring of said aralkyl radical, e.g. papaverine

Full Title

Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems > with radicals, substituted by hetero atoms, attached to carbon atoms of the nitrogen-containing ring > Aralkyl radicals > with oxygen atoms directly attached to the aromatic ring of said aralkyl radical, e.g. papaverine