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Abstract

This invention relates to compounds of formula (I): wherein R.sub.1 is a branched or straight chain C.sub.1-C.sub.6 alkyl; R.sub.2 is of the formula (II), wherein n is an integer ranging from 1 to 8; R.sub.5 is H or (CH.sub.2).sub.pCH.sub.3, and R.sub.6 is H or (CH.sub.2).sub.mOH, wherein p is an integer ranging from 1 to 7 and m is an integer ranging from 1 to 8; R.sub.3 is of the formula (III), wherein q is an integer ranging from 1 to 8; and R.sub.7 is selected from the group consisting of H, OH, NH.sub.2, (CH.sub.2).sub.tOH, and R.sub.9COOH; wherein R.sub.9 is a straight or branched chain alkylene or alkenylene group having 1 to 8 carbon atoms, and t is an integer ranging from 1 to 8; R.sub.4 is of the formula (IV), wherein r is an integer ranging from 1 to 8 and R.sub.8 is selected from the group consisting of H, OH, (CH.sub.2).sub.fNH.sub.2, (CH.sub.2).sub.sOH, and R.sub.10COOH; wherein f is 0 or f and s are independently integers ranging from 1 to 8; and, R.sub.10 is a C.sub.1-C.sub.8 straight or branched chain alkylene or alkenylene; and; salts, solvates, and hydrates thereof. The present invention further provides methods of preparing the compounds of formula (I) and their use as therapeutic agents and diagnostic agents. ##STR1##

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First Claim