The invention describes a vitamin receptor binding drug delivery conjugate, and preparations therefor. The drug delivery conjugate consists of a vitamin receptor binding moiety, a bivalent linker (L), and a drug. The vitamin receptor binding moiety includes vitamins, and vitamin receptor binding analogs...http://www.google.com.au/patents/US7601332?utm_source=gb-gplus-sharePatent US7601332 - Vitamin receptor binding drug delivery conjugates
