1,3-Dioxolo(4,5-g)isoquinoline, 5,5'-((methylimino)dimethylene)bis(7-methyl-, dihydrochloride 20232-89-7 5,5'-((Methylimino)dimethylene)bis(7-methyl-1,3-dioxolo(4,5-g)isoquinoline) dihydrochloride