Crystal violet lactone
3-(4-(Diethylamino)-2-methylphenyl)-3-(1,2-dimethyl-1H-indol-3-yl)isobenzofuran-1(3H)-one
2'-(Dibenzylamino)-6'-(diethylamino)fluoran
2'-(2-Chloroanilino)-6'-(dibutylamino)fluoran
9-(Diethylamino)-3'H-spiro[benzo[a]xanthene-12,1'-isobenzofuran]-3'-one
4,4′,4′′,4′′′-(Oxydimethylidyne)tetrakis[N,N-diethyl-benzenamine
6'-(Diethylamino)-1',3'-dimethyl-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one
One Dye Black 1