This chemical is called Amaranthin, and it can also be named as  (2S)-5-[(2S,3R,4S,5R,6R)-3-[(2R,3R,4S,5S,6S)-6-Carboxy-3,4,5-trihydroxy-oxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1-[2-[(2S)-2,6-dicarboxy-2,3-dihydro-1H-pyridin-4-ylidene]ethylidene]-6-hydroxy-2,3-dihydroindole-2-carboxylate. With the molecular formula of C₃₀H₃₄N₂O₁₉, its molecular weight is 726.59. The CAS registry number of this chemical is 15167-84-7.

Other characteristics of the Amaranthin can be summarised as followings: (1)XLogP3-AA: -2.2; (2)H-Bond Donor: 11; (3)H-Bond Acceptor: 20; (4)Rotatable Bond Count: 9; (5)Tautomer Count: 3; (6)Exact Mass: 726.175577; (7)MonoIsotopic Mass: 726.175577; (8)Topological Polar Surface Area:346; (9)Heavy Atom Count: 51; (10)Formal Charge: 0; (11)Complexity: 1450; (12)Isotope Atom Count: 0; (13)Defined Atom StereoCenter Count: 12; (14)Undefined Atom StereoCenter Count: 0; (15)Defined Bond StereoCenter Count:1; (16)Undefined Bond StereoCenter Count: 0; (17)Covalently-Bonded Unit Count: 1.

You can still convert the following datas into molecular structure:
1.Canonical SMILES: C1C(NC(=CC1=CC=[N+]2C(CC3=CC(=C(C=C32)O)OC4C(C(C(C(O4)CO)O)O)OC5C(C(C(C(O5)C(=O)O)O)O)O)C(=O)[O-])C(=O)O)C(=O)O
2.Isomeric SMILES: C\1[C@H](NC(=C/C1=C/C=[N+]2[C@@H](CC3=CC(=C(C=C32)O)O[C@H]4[C@@H]([C@H]([C@@H]([C@H](O4)CO)O)O)O[C@H]5[C@@H]([C@H]([C@@H]([C@H](O5)C(=O)O)O)O)O)C(=O)[O-])C(=O)O)C(=O)O