Patent ID: 7799762

Claim:
A N-acyl-dipeptide-like compound bearing an acid group in neutral or charged state, at one end portion of said dipeptide-like compound and bearing an accessory functional side chain spacer at the other end portion thereof, the dipeptide-like compound having the formula (I) below wherein R 1 , and R 2 each designate an acyl group derived from a saturated or unsaturated carboxylic acid having 2 to 24 carbon atoms, which is unsubstituted or bears at least one substituent selected from the group consisting of hydroxyl, alkyl, alkoxy, acyloxy, amino, acylamino, acylthio and C 1-24 alkylthio, m and n are integers from 0 to 10, p and q are integers from 1 to 10, Y is O or NH, and wherein one of X or Z designates an acid group either in neutral or charged state selected from the group consisting of phosphono [(C 1-5 )alkoxy], phosphono [(C 1-5 )alkylthio], dihydroxyphosphoryloxy [(C 1-5 )alkoxy], dihydroxyphosphoryloxy [(C 1-5 )alkylthio], and dihydroxyphoshoryloxy, and the other of X or Z designates an accessory functional side chain spacer having the formula (II) below A-(CO) r —(CH2) s -W (II) where A is 0 or S or NH r is 0 or 1 s is an integer from 1 to 10 W is selected from the group consisting of -formyl, -acetyl, -cyano, -halo, -amino, -bromo-, or iodo-acetamido, -acylamido, -diacylimido, -sulfhydryl, -alkylthio, -hydroxyl, -1,2-dihydroxyethyl, -alkoxy, -acyloxy, -vinyl, -ethynyl, -free carboxyl, -esterified carboxyl or carboxyl in the form of a mixed anhydride, amide or hydrazide, -azido and -thiocyano.