There is no especial limitation on the iron compound if it is {HEAD ~ a compound} containing an iron atom in its molecule and is soluble in {TAIL ~ the aforementioned reaction liquid} 
is soluble in
There is no especial limitation on the iron compound if it is { HEAD ~ a compound } containing an iron atom in its molecule and is soluble in { TAIL ~ the aforementioned reaction liquid }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL