Patent ID: 8802675

Claim:
A multifunctional compound of the formula I to VI: wherein X, Y each independently is CH or N; R 1 is H or C 1 -C 6 alkyl; R′ is H or —CONR 2 R 3 R, R 2 , R 3 , R 4 , R 5 , R 6 and R 7 each independently is H or a C 1 -C 30 hydrocarbyl; or R 2 and R 3 together with the nitrogen atom to which they are attached form a 5-7 saturated ring optionally containing a further heteroatom selected from the group consisting of O, N and S, and optionally further substituted by an aralkyl group; R 8 is CON(R)OH; Z is (CH 2 ) m — or O; n is 1 to 10; and m is 0 to 10; wherein said C 1 -C 30 hydrocarbyl is a radical selected from the group consisting of a straight or branched alkyl, alkenyl, or alkynyl, aryl, aralkyl, cycloalkyl and arylcycloalkyl; and an optical isomer and a pharmaceutically acceptable salt thereof.