1 3-BIS(4-(DIMETHYLAMINO)-2-HYDROXYPHEN&

1,3-bis(4-(dimethylamino)-2-hydroxyphenyl) -2,4-D

1,3-BIS(4-(DIMETHYLAMINO)-2-HYDROXYPHENY L) -2,4-DIHYDROXYCYCLOBUTENEDIYLIUM(OH)2

1,3-bis[4-(dimethylamino)-2-hydroxyphenyl]-2,4-dihydroxycyclobutenediylium dihydroxide, bis(inner salt)

1-(4-Dimethylamino-2-hydroxy-phenyl)-3-(4-dimethylimmonium-2-hydroxy-cyclohexa-2,5-dien-1-ylidene)-2-oxo-cyclobuten-4-olate