1 936 5-methoxy-1,2-dimethyl-3-(4-nitrophenoxymethyl)indole-4,7-dione 1.000 2 340 5-methoxy-1,2-dimethyl-3-(phenoxymethyl)indole-4,7-dione 0.885 3 O73 5-[(4-aminobutyl)amino]-1,2-dimethyl-3-[(4-nitrophenoxy)methyl]-1h-indole-4,7-dione 0.750