FE (III) ION non-polymer HETAI Fe 3 1999-07-08 2011-06-04 N REL 55.845 FE N N RCSB FE FE 3 0 N N N 0.000 0.000 0.000 0.000 0.000 0.000 FE FE 1 [Fe+3] [Fe+3] [Fe+3] [Fe+3] [Fe+3] InChI=1S/Fe/q+3 VTLYFUHAOXGGBS-UHFFFAOYSA-N iron(3+) iron(+3) cation RCSB RCSB