the third porphyrin , previously reported to be an analogue of coproporphyrin in which one propionate group is replaced by an alpha- or beta-hydroxypropionate group , was shown to be tris- ( 2-carboxyethyl ) -carboxymethyl- ( 1-hydroxyethyl ) -trimethyl porphin ( hydroxyisocoproporphyrin ) .
C0032712
porphyrin
C0009988
coproporphyrin