MetaCyc Compound Class: a chlorin

Superclasses: a macrocycle

A chlorin is a large heterocyclic aromatic ring consisting of 3 pyrroles and one reduced pyrrole, coupled through 4 methine linkages. Unlike a porphyrin, a chlorin is largely aromatic, but not aromatic through the entire circumference of the ring.

Chlorophylls are Mg-containing chlorin derivatives.

a chlorin compound structure

Chemical Formula: C20H16N4

Child Classes: a bacteriochlorin (9) , a chlorophyll (6) , a chlorophyllide (10) , a pheophytin (6)

pheophorbide a ,
pheophorbide b ,
pyropheophorbide a

Monoisotopic Molecular Weight: 312.13749653440004 Daltons

SMILES: C1(=CC5(N=C1C=C2(NC(C=C2)=CC3(=NC(CC3)=CC4(NC(=CC=4)C=5)))))

Standard Gibbs Free Energy of Change Formation (ΔfG in kcal/mol): 303.66794 Inferred by computational analysis [Latendresse13]


Latendresse13: Latendresse M. (2013). "Computing Gibbs Free Energy of Compounds and Reactions in MetaCyc."

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Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
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