SMILES: CCC1=C(C2=NC1=CC3=C(C4=C([N-]3)C(=C5[C@H]([C@@H](C(=N5)C=C6C(=C(C(=C2)[N-]6)C=C)C)C)CCC(=O)[O-])[C@H](C4=O)C(=O)OC)C)C=O.[Mg+2]
Description: The molecule is a cyclic tetrapyrrole anion that is the conjugate base of chlorophyllide b, arising from deprotonation of the carboxy group. It is a cyclic tetrapyrrole anion and a monocarboxylic acid anion. It is a conjugate base of a chlorophyllide b. It is a conjugate acid of a chlorophyllide b(2-).