Patent ID: 7923468

Claim:
A compound of the formula I wherein X is CH 2 , O or NH; R1 is (C 1 -C 4 )alkyl; R2, R2′, R3, R3′, R4, R4′, R5, R5′, R6, R6′ are, independently of one another, H, OH, F, Cl, Br, I, CF 3 , NO 2 , N 3 , CN, COOH, COO(C 1 -C 6 )alkyl, CONH 2 , CONH(C 1 -C 6 )alkyl, CON[(C 1 -C 6 )alkyl] 2 , (C 1 -C 6 )alkyl, (C 2 -C 6 )alkenyl, (C 2 -C 6 )alkynyl, O—(C 1 -C 6 )alkyl, where one, more than one, or all hydrogen(s) in the alkyl radicals may be replaced by fluorine; C(═NH)(NH 2 ), PO 3 H 2 , SF 5 , SO 3 H, OSO 3 H, SO 2 —NH 2 , SO 2 NH(C 1 -C 6 )alkyl, SO 2 N[(C 1 -C 6 )alkyl] 2 , S—(C 1 -C 6 )alkyl, S—(CH 2 ) n -phenyl, SO—(C 1 -C 6 )alkyl, SO—(CH 2 ) n -phenyl, SO 2 —(C 1 -C 6 )alkyl, SO 2 —(CH 2 ) n -phenyl, where n may be 0-6, and the phenyl radical may be substituted up to twice by F, Cl, Br, OH, CF 3 , NO 2 , CN, OCF 3 , O—(C 1 -C 6 )alkyl, (C 1 -C 6 )alkyl or NH 2 ; NH 2 , NH—(C 1 -C 6 )alkyl, N((C 1 -C 6 )alkyl) 2 , NH(C 1 -C 7 )acyl, phenyl, O—(CH 2 ) n -phenyl, where n may be 0-6, where the phenyl ring may be substituted one to 3 times by F, Cl, Br, I, OH, CF 3 , NO 2 , CN, OCF 3 , O—(C 1 -C 6 )alkyl, (C 1 -C 6 )alkyl, NH 2 , NH(C 1 -C 6 )alkyl, N((C 1 -C 6 )alkyl) 2 , SO 2 —CH 3 , COOH, COO—(C 1 -C 6 )alkyl, CONH 2 ; or a pharmaceutically acceptable salt thereof.