The invention provides, in a general sense, a new labeling strategy employing 99mTc chelated with ethylenedicysteine (EC). EC is conjugated with a variety of ligands and chelated to 99mTc for use as an imaging agent for tissue-specific diseases. The drug conjugates of the invention may also be used as...http://www.google.com.au/patents/US7582281?utm_source=gb-gplus-sharePatent US7582281 - Ethylenedicysteine (EC)-drug conjugates compositions and methods for tissue specific disease imaging
