1-(2-Hydroxyethoxy)-6-methyl-furo(3,4-c)pyridin-7-ol hydrochloride 73839-78-8 Furo(3,4-c)pyridin-7-ol, 1-(2-hydroxyethoxy)-6-methyl-, hydrochloride Pyridoxal-aethylenacetal hydrochlorid [German]