Indigotin; Indigo Blue; Vat blue 1; Cystoceva; Diindogen; Pigment Blue 66; Vulcafix Blue R; Indigo Pure BASF; Indigo Ciba; Indigo Synthetic; Synthetic Indigo; Indigo J; Indigo N; Indigo P; Indigo Powder W; Vulcafor Blue A; Vynamon Blue A; Indigo VS; Indigo Ciba SL; Indigo NAC; Indigo PLN; Indigo NACCO; C.I. Vat Blue 1; Mitsui Indigo Pure; Mitsui Indigo Paste; indigo dye; Synthetic Indigo TS; Vulcol Fast Blue GL; Lithosol Deep Blue B; Vulcanosine Dark Blue L; Blue No. 201; D and C Blue No. 6; Lithosol deep blue V; Indigo,natural; Indigo Pure BASF Powder K; 11669 Blue; Monolite Fast Navy Blue BV; (2,2'-Biindoline)-3,3'-dione; D&C Blue No. 6; Modr kypova 1; Indigo (synthetic); C.I. 73000; NCI-C61392; Indigo, synthetic; UNII-1G5BK41P4F; C.I Vat blue 1; CI 73000; D&C Blue No.6; D&C Blue 6; D+C Blue No. 6; NSC-8645; D And C Blue Number 6; 1G5BK41P4F; CHEMBL599552; .DELTA.2,2'-Bipseudoindoxyl; MFCD00005722; NCGC00163355-01; C.I.73000; (delta(sup 2,2')-Biindoline)-3,3'-dione; DSSTox_CID_6279; 1H,1'H-[2,2']Biindolylidene-3,3'-dione; DSSTox_RID_78086; DSSTox_GSID_26279; Indigo (VAN); CI Vat Blue 1; CI Pigment Blue 66; Modr Kypova 1 [Czech]; delta2,2'-Bipseudoindoxyl; D & C Blue No. 6; Indigo (dye); SMR000857361; CCRIS 4379; HSDB 4372; (2E)-2,2'-biindole-3,3'(1H,1'H)-dione; delta(sup 2,2')-Bipseudoindoxyl; NSC 8645; C.I. pigment blue 66; EINECS 207-586-9; BRN 0088275; Indigoblau; cis-indigo; Pigment Indigo; AI3-09080; indigo B; Indigo Naturalis; (delta2,2'(3H,3'H)-Biindole)-3,3'-dione; Indigofera tinctoria; Indigotin (natural); Indigo [HPUS]; Indigo [HSDB]; Indigo [MI]; Indigo,(S); (delta2,2'-Biindoline)-3,3'-dione; D & C blue No 6; EC 207-586-9; [.DELTA.2,3'-dione; (2E)-2-(3-oxoindolin-2-ylidene)indolin-3-one; SCHEMBL42280; SCHEMBL56085; 5-24-08-00503 (Beilstein Handbook Reference); MLS001335921; MLS001335922; CHEMBL35479; D&C Blue No. 6 [II]; AO201 [INCI]; MEGxp0_001924; (2E)-2-(3-oxo-1H-indol-2-ylidene)-1H-indol-3-one; DTXSID3026279; Indigo (C.I. 73000); ACon1_002192; COHYTHOBJLSHDF-BUHFOSPRSA-; CTK2F4078; NSC8645; AO201; CI 73000 [INCI]; BCP26169; HY-N0335; Tox21_112052; Tox21_202545; BDBM50310357; s3876; AKOS015900171; AKOS015955899; Indigo, synthetic, Dye content 95 %; Tox21_112052_1; ZINC100014196; ZINC100513617; ZINC137102896; ZINC197603377; AC-8002; CCG-267072; MCULE-5170690249; NCGC00091633-01; NCGC00163355-02; NCGC00163355-03; NCGC00163355-04; NCGC00163355-05; NCGC00260094-01; [(D)(2,2')-Biindoline]-3,3'-dione; 2,2'-Biindole-3,3'(1H,1'H)-dione; 2-(3-oxoindolin-2-ylidene)indolin-3-one; (.DELTA.2,2'-Biindoline)-3,3'-dione; (E)-[2,2'-Biindolinylidene]-3,3'-dione; (Z)-[2,2'-Biindolinylidene]-3,3'-dione; [.DELTA.2,3'H)-Biindole]-3,3'-dione; CS-0008896; FT-0627197; I0212; N1630; ST50308404; (delta2,2'-Biindoline)-3,3'-dione (8CI); VAT BLUE 1 (INDIGO C.I. 73000); A14526; Q422662; SR-01000941903; (.DELTA.2,2'(3H,3'H)-Biindole)-3,3'-dione; 2-(3-Hydroxy-2H-indol-2-ylidene)-2H-indol-3-ol; J-521528; SR-01000941903-2; 3-CARBOXY-1,4-DIMETHYL-1H-PYRROLE-2-ACETICACID