SMILES: CC1=CC(=C(C2=CC(=C(C=C2)N)S(=O)(=O)[O-])C3=CC(=C(C=C3)N)S(=O)(=O)[O-])C=C(C1=[NH2+])S(=O)(=O)[O-]
Description: The molecule is an organosulfonate oxoanion obtained by the removal of two protons from 2-amino-5-[(4-amino-3-sulfophenyl)(4-imino-3-sulfocyclohexa-2,5-dien-1-ylidene)methyl]-3-methylbenzene-1-sulfonic acid (the free acid form of the biological stain 'acid fuchsin'). It is a conjugate base of an acid fuchsin (free acid form).