3,3'-(Nonamethylenediimino)dipropionaldehyde dihydrochloride 38770-23-9 4,14-Diazaheptadecanedialdehyde dihydrochloride Propanal, 3,3'-(1,9-decanediyldiimino)bis-, dihydrochloride Propionaldehyde, 3,3'-(nonamethylenediimino)di-, dihydrochloride