Patent ID: 7731936

Claim:
Metal complexes based on tetrathiol ligands with the formula wherein each (CH—R 1 ) represents a substituted or unsubstituted methylene-group and each R 1 represents H, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, m and n represent the number of methylene groups and the sum of m and n is between 4 and 10, each R 2 represents H, OR 1 or NHR 1 , Y represents 4 times H, 99m TcO, 186 ReO, 188 ReO, 99m TcN, 186 ReN, or 188 ReN, X represents (CH) 2 , an unsubstituted amino group (N—H) or substituted amino group (N-Z), the guanidyl unit or a urea group wherein Z represents —(CH—R 1 ) p -A, represents the number of methylene groups and is between 2 and 8, and A represents a couplable unit.