| http://www.w3.org/ns/prov#value | - More preferred compounds of the formula Ib have one or more of the following features: (1) Y and Yo on each porphyrin ring are independently H or chloro, (b) one of X1, X2 and X3 is SO3 H, (c) at least two of X, Xo, X1, X2 and X3 are chloro, more particularly with X and Xo being chloro, and (d) M is Fe.
|
