1,7-Bis(N-tetrahydroisoquinolyl)heptane dihydrochloride 2,2'-(1,7-Heptanediyl)bis(1,2,3,4-tetrahydroisoquinoline) dihydrochloride 63732-06-9 ISOQUINOLINE, 2,2'-(1,7-HEPTANEDIYL)BIS(1,2,3,4-TETRAHYDRO-, DIHYDROCHLORIDE