6 5 4 3 pounds in this group were those which contained C1 or Br atom in positions 3 or 6 and in which R was an unbranched alkyl 4-7 C long. The best of these, 6-bromo-a-(di-n- heptylaminomethyl)-9-phenanthrenemethanol-HCl, 3 was used as our standard for comparison.