Patent ID: 7026304

Claim:
A 2-alkylated-cyclodextrin derivative represented by formula I wherein m is 0–7 and n is 1–8 and m+n=7 or 8; R is (CH 2 ) p -phenylene-(CH 2 ) q , (C 1-6 )alkylene, or (CH 2 ) r —S—(C 1-4 )alkylene, of which each alkylene group may be substituted with 1–3 OH groups; p and r are independently 1–4; q is 0–4; X is COOH, SO 2 OH, (CH 2 —CH 2 —O) s —H or OH; s is 1–3; or a pharmaceutically acceptable salt thereof; with the proviso that when m+n=7, n is 1 and X is OH, R cannot be 2-methyl-1,2-ethanediyl, 2,2-dimethyl-1,2-ethanediyl, 2-hydroxy-1,3-propanediyl or 2-hydroxy-2-methyl-1,3-propanediyl.