SMILES: CCN(CC1=CC(=CC=C1)S(=O)(=O)O)C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)O)C=C3)C5=C(C=C(C=C5)O)S(=O)(=O)O
Description: The molecule is an iminium ion that is the free acid form of Fast green FCF. It is a conjugate acid of a Fast green FCF(2-).