SMILES: CC1C(=C(NC1=O)/C=C\\2/C(=C(/C(=C/C3=N/C(=C\\C4=[NH+]C(=O)C(=C4CCC(=O)[O-])C)/C(=C3C)CCC(=O)[O-])/N2)C=C)C)C=C
Description: The molecule is a linear tetrapyrrole anion obtained by deprotonation of the two carboxy groups and protonation of the imine nitrogen of biliverdin delta; It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a linear tetrapyrrole anion and a dicarboxylic acid monoanion. It is a conjugate base of a biliverdin delta.