Patent ID: 7129229

Claim:
A compound of the general formula: P r —O-L a -Bz-(CONHNH-P Ga ) m wherein: Bz is a benzene ring, L a is a branched or unbranched hydrocarbon of 1 to 12 carbons, arid L a may optionally include 1 to 4 ether or amide linkages between the carbons; P r is a phosphorous bearing reactive group selected from the group consisting of R a and R b are branched or unbranched hydrocarbons with 1 to 12 carbons; R c is selected from the group consisting of 2-cyanoethyl, allyl, methyl, ethyl, and other alkyl moieties; each P Ga is, independently, any suitable hydrazide protecting group; and m is 1, 2, or 3.