Patent ID: 7459549

Claim:
A cyclodextrin derivative represented by Formula 8 below: wherein n is an integer from 6 to 10; R 1 ′ and R 2 ′ are independently a divalent group derived from substituents containing OH, SH or NH 2 which form a crosslinked structure; and R 3 is —OR 4 , wherein R 4 is a C 2˜30 acyl group, a C 1˜20 alkyl group, a C 3˜10 cycloalkyl group, a C 1˜20 hydroxyalkyl group, a carboxyl group, or a silicon compound represented by Sir 1 r 2 r 3 , wherein r 1 , r 2 and r 3 are independently a C 1˜5 alkyl group, a C 1˜5 alkoxy group, or a C 6˜20 aryl group.