(2S,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-N-ethyl-3,4-dihydroxyoxolane-2-carboxamide

4-[[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]methylcarbamoyl]benzenesulfonyl fluoride

1-[[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]methyl]-3-(4-isothiocyanatophenyl)thiourea

N-[[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]methyl]bicyclo[2.2.2]octa-2,5-diene-2-carboxamide

1-[2-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]ethyl]-3-(4-isothiocyanatophenyl)thiourea

(2R,3S,4R,5R)-2-(hydroxymethyl)-5-[6-(6-isothiocyanatohexylamino)purin-9-yl]oxolane-3,4-diol

N-[4-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]but-3-ynyl]benzamide

N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]bicyclo[2.2.2]octa-2,5-diene-2-carboxamide

(2R,3S,4R,5R)-2-(hydroxymethyl)-5-[6-[4-(isothiocyanatomethyl)anilino]purin-9-yl]oxolane-3,4-diol

1-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]-3-(4-isothiocyanatophenyl)thiourea

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[7-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]heptyl]benzamide

N-[10-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]decyl]bicyclo[2.2.2]octa-2,5-diene-2-carboxamide

1-[10-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]decyl]-3-(4-isothiocyanatophenyl)thiourea

4-(5-amino-4-benzoylthiophen-2-yl)-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

(2S,3S,4R,5R)-3,4-Dihydroxy-5-[6-(3-iodo-benzylamino)-purin-9-yl]-tetrahydro-furan-2-carboxylic acid methylamide

[2-amino-5-[4-[1-[5-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]pentyl]triazol-4-yl]phenyl]-4-[3-(trifluoromethyl)phenyl]thiophen-3-yl]-phenylmethanone

3-(5-aminothiophen-2-yl)-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]-3-thiophen-2-ylbenzamide

4-[5-amino-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

2-Amino-N6-cyclopentyladenosine-5'-N-methylcarboxamide

N-[3-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]prop-2-ynyl]benzamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

N-[3-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]propyl]benzamide

(2S,3S,4R,5R)-5-[6-[6-[[4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]benzoyl]amino]hexylamino]purin-9-yl]-N-ethyl-3,4-dihydroxyoxolane-2-carboxamide

N-[4-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]butyl]benzamide

N-[5-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]pent-4-ynyl]benzamide

2-Amino-N6-cyclohexyladenosine-5'-N-methylcarboxamide

2-Amino-N6-cyclobutyladenosine-5'-N-methylcarboxamide

[2-amino-5-[4-[1-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]triazol-4-yl]phenyl]-4-[3-(trifluoromethyl)phenyl]thiophen-3-yl]-phenylmethanone

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[5-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]pentyl]benzamide

N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]-4-[3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]benzamide

4-[10-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]decylcarbamoyl]benzenesulfonyl fluoride

(2R,3S,4R,5R)-2-(hydroxymethyl)-5-[6-(10-isothiocyanatodecylamino)purin-9-yl]oxolane-3,4-diol

3-(4-benzoylthiophen-2-yl)-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

3-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

4-[4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[3-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]propyl]benzamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[2-chloro-9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

4-[5-acetamido-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

(2R,3S,4R,5R)-2-(hydroxymethyl)-5-[6-(2-isothiocyanatoethylamino)purin-9-yl]oxolane-3,4-diol

N-[5-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]pentyl]benzamide

4-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexylcarbamoyl]benzenesulfonyl fluoride

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[4-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]butyl]benzamide

2-Amino-N6-(3-iodobenzyl)adenosine-5'-N-methylcarboxamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[2-amino-9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

[2-amino-5-[4-[1-[7-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]heptyl]triazol-4-yl]phenyl]-4-[3-(trifluoromethyl)phenyl]thiophen-3-yl]-phenylmethanone

2-Amino-N6-phenethyladenosine-5'-N-methylcarboxamide

2-Amino-N6-propyladenosine-5'-N-methylcarboxamide

2-Amino-N6-(3-chlorobenzyl)adenosine-5'-N-methylcarboxamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[5-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]pent-4-ynyl]benzamide

2-Methylamino-N6-cyclopentyladenosine-5'-N-methylcarboxamide

2-Amino-N6-(2,2-diphenylethyl)adenosine-5'-N-methylcarboxamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[3-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]prop-2-ynyl]benzamide

(CGS21680) 3-(4-{2-[6-Amino-9-(5-ethylcarbamoylmethyl-3,4-dihydroxy-tetrahydro-furan-2-yl)-9H-purin-2-ylamino]-ethyl}-phenyl)-propionic acid

2-Ethylamino-N6-cyclopentyladenosine-5'-N-methylcarboxamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[4-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]but-3-ynyl]benzamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[2-[4-[2-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]ethyl]phenyl]ethyl]benzamide

2-Amino-N6-butyladenosine-5'-N-methylcarboxamide

3-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]propanamide

3-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[5-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]pentyl]propanamide

2-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[6-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]hexyl]benzamide

3-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[7-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]heptyl]propanamide

4-[5-amino-4-benzoyl-3-[3-(trifluoromethyl)phenyl]thiophen-2-yl]-N-[5-[4-[[9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]purin-6-yl]amino]phenyl]pentyl]benzamide

2-Amino-N6-ethyladenosine-5'-N-methylcarboxamide

2-Amino-N6-methyladenosine-5'-N-methylcarboxamide

2-Amino-N6-benzyladenosine-5'-N-methylcarboxamide

2-Diethylamino-N6-cyclopentyladenosine-5'-N-methylcarboxamide

2-Dimethylamino-N6-cyclopentyladenosine-5'-N-methylcarboxamide

ethyl 5-amino-3-(3-chlorophenyl)-4-oxothieno[3,4-d]pyridazine-1-carboxylate

ethyl 5-amino-4-oxo-3-phenylthieno[3,4-d]pyridazine-1-carboxylate

5-[5-[[2-[4-[(E)-2-(2,2-difluoro-12-thiophen-2-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaen-4-yl)ethenyl]phenoxy]acetyl]amino]pentanoylamino]-N-[3-[2-[[2-[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)phenoxy]acetyl]amino]ethylamino]-3-oxopropyl]pentanamide

ethyl 3-(4-acetyloxyphenyl)-5-amino-4-oxothieno[3,4-d]pyridazine-1-carboxylate

ethyl 5-amino-3-(4-hydroxyphenyl)-4-oxothieno[3,4-d]pyridazine-1-carboxylate

ethyl 5-amino-3-(4-iodophenyl)-4-oxothieno[3,4-d]pyridazine-1-carboxylate

ethyl 5-amino-3-(4-methoxyphenyl)-4-oxothieno[3,4-d]pyridazine-1-carboxylate

3-(4-(2-(6-(4-(9-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-9H-purin-6-ylamino)butylamino)-6-oxohexylamino)-2-oxoethoxy)styryl)-5,5-difluoro-7-(thiophen-2-yl)-5H-dipyrrolo[1,2-c:1',2'-f][1,3,2]diazaborinin-4-ium-5-uide

(2S,3S,4R,5R)-5-[6-[4-[[2-[[(2R)-2-[[(2R)-2-[6-[[2-[4-[(E)-2-(2,2-difluoro-12-thiophen-2-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaen-4-yl)ethenyl]phenoxy]acetyl]amino]hexanoylamino]propanoyl]amino]propanoyl]amino]acetyl]amino]butylamino]purin-9-yl]-N-ethyl-3,4-dihydroxyoxolane-2-carboxamide

3-(4-(2-(6-(4-(9-((2R,3R,4S,5S)-5-(ethylcarbamoyl)-3,4-dihydroxytetrahydrofuran-2-yl)-9H-purin-6-ylamino)butylamino)-6-oxohexylamino)-2-oxoethoxy)styryl)-5,5-difluoro-7-(thiophen-2-yl)-5H-dipyrrolo[1,2-c:1',2'-f][1,3,2]diazaborinin-4-ium-5-uide

N-[2-[3-[3-[6-[[2-[4-[(E)-2-(2,2-difluoro-12-thiophen-2-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaen-4-yl)ethenyl]phenoxy]acetyl]amino]hexanoylamino]propanoylamino]propanoylamino]ethyl]-4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carboxamide

(1r,4r)-4-(2-phenyl-7H-pyrrolo[2,3-d]pyrimidin-4-ylamino)cyclohexanol

tert-butyl N-[3-[[3-[2-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]ethylamino]-3-oxopropyl]amino]-3-oxopropyl]carbamate

1-N-[3-[8-(1-adamantyl)-2,6-dioxo-1-propyl-7H-purin-3-yl]propyl]-4-N-[2-[6-[[2-[4-[(E)-2-(2,2-difluoro-12-thiophen-2-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaen-4-yl)ethenyl]phenoxy]acetyl]amino]hexanoylamino]ethyl]benzene-1,4-dicarboxamide

tert-butyl N-[3-[[3-[2-[3-[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)-1-bicyclo[2.2.2]octanyl]propanoylamino]ethylamino]-3-oxopropyl]amino]-3-oxopropyl]carbamate

5-[[2-[4-[(E)-2-(2,2-difluoro-12-thiophen-2-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaen-4-yl)ethenyl]phenoxy]acetyl]amino]-N-[2-[[2-[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)phenoxy]acetyl]amino]ethyl]pentanamide

1-N-[3-[8-(1-adamantyl)-2,6-dioxo-1-propyl-7H-purin-3-yl]propyl]-4-N-[2-[3-[6-[[2-[4-[(E)-2-(2,2-difluoro-12-thiophen-2-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaen-4-yl)ethenyl]phenoxy]acetyl]amino]hexanoylamino]propanoylamino]ethyl]benzene-1,4-dicarboxamide

tert-butyl N-[2-[2-[2-[3-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]propanoylamino]ethylamino]-2-oxoethoxy]ethyl]carbamate

tert-butyl N-[3-[[3-[3-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]propylamino]-3-oxopropyl]amino]-3-oxopropyl]carbamate

tert-butyl N-[2-[2-[2-[2-[3-[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)-1-bicyclo[2.2.2]octanyl]propanoylamino]ethylamino]-2-oxoethoxy]ethoxy]ethyl]carbamate

tert-butyl N-[2-[2-[2-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]ethylamino]-2-oxoethoxy]ethyl]carbamate

tert-butyl N-[2-[2-[2-[3-[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)-1-bicyclo[2.2.2]octanyl]propanoylamino]ethylamino]-2-oxoethoxy]ethyl]carbamate

tert-butyl N-[2-[2-[3-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]propylamino]-2-oxoethoxy]ethyl]carbamate

tert-butyl N-[2-[2-[2-[2-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]ethylamino]-2-oxoethoxy]ethoxy]ethyl]carbamate

N-[2-[6-[[2-[4-[(E)-2-(2,2-difluoro-12-thiophen-2-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaen-4-yl)ethenyl]phenoxy]acetyl]amino]hexanoylamino]ethyl]-4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carboxamide

tert-butyl N-[2-[2-[2-[3-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]propylamino]-2-oxoethoxy]ethoxy]ethyl]carbamate

(2E)-1-[6-[[3-[[3-[2-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]ethylamino]-3-oxopropyl]amino]-3-oxopropyl]amino]-6-oxohexyl]-3,3-dimethyl-2-[(2E,4E)-5-(1,3,3-trimethyl-5-sulfoindol-1-ium-2-yl)penta-2,4-dienylidene]indole-5-sulfonate

(2E)-1-[6-[2-[[4-(2,6-dioxo-1,3-dipropyl-7H-purin-8-yl)bicyclo[2.2.2]octane-1-carbonyl]amino]ethylamino]-6-oxohexyl]-3,3-dimethyl-2-[(2E,4E)-5-(1,3,3-trimethyl-5-sulfoindol-1-ium-2-yl)penta-2,4-dienylidene]indole-5-sulfonate

(2E)-1-[6-[2-[[4-[3-[8-(1-adamantyl)-2,6-dioxo-1-propyl-7H-purin-3-yl]propylcarbamoyl]benzoyl]amino]ethylamino]-6-oxohexyl]-3,3-dimethyl-2-[(2E,4E)-5-(1,3,3-trimethyl-5-sulfoindol-1-ium-2-yl)penta-2,4-dienylidene]indole-5-sulfonate

(2E)-1-[6-[[3-[2-[[4-[3-[8-(1-adamantyl)-2,6-dioxo-1-propyl-7H-purin-3-yl]propylcarbamoyl]benzoyl]amino]ethylamino]-3-oxopropyl]amino]-6-oxohexyl]-3,3-dimethyl-2-[(2E,4E)-5-(1,3,3-trimethyl-5-sulfoindol-1-ium-2-yl)penta-2,4-dienylidene]indole-5-sulfonate