Macromolecular transition metal complexes characterized by being: (2,2'-bipyridine-4,4'-diylbis{methylene}bis(2-{2-(2-hydroxypropanoyloxy)poly(lactic acid)-yl}propanoate)-k 2 N,N')(carbonyl)(η 5 -cyclopentadienyl)ruthenium hexafluorophosphate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1 oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)dianthracene-9-carboxylate)-k 2 N,N'](carbonyl)(η 5 -cyclopentadienyl)ruthenium hexafluorophosphate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1-oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)dianthracene-9-carboxylate)- k 2 N,N'](triphenylphosphane)(η 5 -cyclopentadienyl)ruthenium) triflate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1-oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)dinaphthalene-2-carboxylate)- k 2 N,N'](triphenylphosphane)(η 5 -cyclopentadienyl)ruthenium triflate; (2,2'-bipyridine-4,4'-diylbis{methylene}bis(2-{2-(2-hydroxypropanoyloxy)poly(lactic acid)-yl}propanoate)-k 2 N,N')(triphenylphosphane)(η 5 -cyclopentadienyl)ruthenium triflate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1-oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)di(2S,3S,4S,5R,6R)-3,4,5,6-tetrahydroxyoxane-2-carboxylate)-k 2 N,N'](triphenylphosphane)(η 5 -cyclopentadienyl)-ruthenium triflate; [1-({1-({1-(Benzyloxy)-1-oxopropane-2-yl}oxy)-1-(poly-(lactic acid))}-1-oxopropane-2-yl-4-(diphenylphosphino)benzoate-k 1 P](carbonyl)(iodide)(η 5 -cyclopentadienyl)iron; [Tris(1-{1-(1-hydroxypropanoyloxy)poly(lactic acid)-il}propanoate)fosfano-k 1 P] (carbonyl)(iodide)(η 5 -cyclopentadienyl)iron; or [(1-({1-({1-(Benzyloxy)-1-oxopropane-2-yl}oxy)-1-(poly-(lactic acid)1-1-oxopropane-2-yl)-4-(diphenylphosphino)benzoate-k 1 P]((2-benzoyl pyridine)-k 2 N,O)(η 5 -cyclopentadienyl) ruthenium triflate. and pharmacologically acceptable salts thereof. (2,2'-bipyridine-4,4'-diylbis{methylene}bis(2-{2-(2-hydroxypropanoyloxy)poly(lactic acid)-yl}propanoate)-k 2 N,N')(carbonyl)(η 5 -cyclopentadienyl)ruthenium hexafluorophosphate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1 oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)dianthracene-9-carboxylate)-k 2 N,N'](carbonyl)(η 5 -cyclopentadienyl)ruthenium hexafluorophosphate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1-oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)dianthracene-9-carboxylate)- k 2 N,N'](triphenylphosphane)(η 5 -cyclopentadienyl)ruthenium) triflate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1-oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)dinaphthalene-2-carboxylate)- k 2 N,N'](triphenylphosphane)(η 5 -cyclopentadienyl)ruthenium triflate; (2,2'-bipyridine-4,4'-diylbis{methylene}bis(2-{2-(2-hydroxypropanoyloxy)poly(lactic acid)-yl}propanoate)-k 2 N,N')(triphenylphosphane)(η 5 -cyclopentadienyl)ruthenium triflate; [(1,1'-{1,1'-(1,1'-{2,2'-bipyridine-4,4'-diylbis(methylene)}bis(oxy)bis(1-oxopropane-2, 1 -diyl))bis(poly(lactic acid)-yl))}bis(oxy)bis(1-oxopropane-2,1-diyl)di(2S,3S,4S,5R,6R)-3,4,5,6-tetrahydroxyoxane-2-carboxylate)-k 2 N,N'](triphenylphosphane)(η 5 -cyclopentadienyl)-ruthenium triflate; [1-({1-({1-(Benzyloxy)-1-oxopropane-2-yl}oxy)-1-(poly-(lactic acid))}-1-oxopropane-2-yl-4-(diphenylphosphino)benzoate-k 1 P](carbonyl)(iodide)(η 5 -cyclopentadienyl)iron; [Tris(1-{1-(1-hydroxypropanoyloxy)poly(lactic acid)-il}propanoate)fosfano-k 1 P] (carbonyl)(iodide)(η 5 -cyclopentadienyl)iron; or [(1-({1-({1-(Benzyloxy)-1-oxopropane-2-yl}oxy)-1-(poly-(lactic acid)1-1-oxopropane-2-yl)-4-(diphenylphosphino)benzoate-k 1 P]((2-benzoyl pyridine)-k 2 N,O)(η 5 -cyclopentadienyl) ruthenium triflate.