Read more 1-(2-Dibenzylamino-4-methyl-thiazol-5-yl)-3-(2,5-dihydro-2- dibenzylimmonium-4-methyl-thiazol-5-ylidene)-2-oxo- cyclobuten-4-olate
Read more 1-(2-Hydroxy-julolidin-4-yl)-3-(1,4-dihydro-2-hydroxy-julolidin- 4-ylidene-onium)-2-oxo-cyclobuten-4-olate
Read more 1-(3,4-Diphenyl-5-morpholino-thien-2-yl)-3-(2,5-dihydro-3,4-diphenyl-5-[morpholin-1-ylidene-onium]-thien-2-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(1,1,3-Trimethyl-1H-benzo[e]indol-2-ylidene-methyl)-3-(1,1,3-trimethyl-1H-benzo[e]indolium-2-yl-methylene)- cyclobuten-2-one-4-olate
Read more 1-(4-Dimethylamino-phenyl)-3-(4-dimethylimmonium-cyclohexa- 2,5-dien-1-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(5-Piperdino-thien-2-yl)-3-(2,5-dihydro-5-[piperidin-1-ylidene-onium]-thien-2-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(4-Phenyl-2-piperidino-thiazol-5-yl)-3-(2,5-dihydro-4-phenyl-2-[piperidin-1-ylidene-onium]-thiazole-5-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(1-Benzyl-quinolin-4-ylidenemethyl)-3-(1-benzyl-quinolinium-4-yl-methylene)-2-oxo-cyclobutene-4-olate
Read more 1-(4-Dimethylamino-2-hydroxy-phenyl)-3-(4- dimethylimmonium-2-hydroxy-cyclohexa-2,5-dien-1-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(5-Pyrrolidino-thien-2-yl)-3-(2,5-dihydro-5-[pyrrolidin-1-ylidene-onium]-thien-2-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(4-Methyl-2-morpholino-thiazol-5-yl)-3-(2,5-dihydro-4- methyl-2-[morpholin-1-ylidene-onium]-thiazol-5-ylidene)-2-oxo- cyclobuten-4-olate
Read more 1-(3,5-Dimethyl-4-ethyl-pyrrol-2-yl)-3-(3,5-dimethyl-4-ethyl- pyrrolium-2-ylidene)-cyclobuten-2-one-4-olate
Read more 1-(4-Diethylamino-2-hydroxyphenyl)-3-(4-diethylimmonium-2-hydroxycyclohexa-2,5-dien-1-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(4-Dimethylamino-2-hydroxy-6-methyl-phenyl)-3- (4-dimethylimmonium-2-hydroxy-6-methyl-cyclohexa-2,5-dien-1-ylidene)-2-oxo-cyclobuten-4-olate
Read more 1-(1,1-Dimethyl-3-butyl-1H-benzo[e]indol-2-ylidenemethyl)-3-(1,1-dimethyl-3-butyl-1H-benzo[e]indolium-2-yl-methylene)-cyclobuten-2-one-4-olate
