3d image of porphine skeletal formula

porphine porphin c20h14n4 pyrrole-like ring macrocycle tetrapyrrole aromatic heterocyclic piper betle porphyrins derivative protoporphyrin ix octaethylporphyrin tetraphenylporphyrin metabolite metabolism biosynthesis cycle mechanism pathway path catabolism biosynthetic intermediate biogenesis substrate precursor synthesis derivative bioprecursor metabolic enzyme endogenous contractor cell biology biochemistry biomolecule bioactive biochemical molecule molecular formula skeletal structural structure atom 3d