| abstract |
The invention provides a polymer and a pharmaceutical composition comprising it. According to an embodiment of the present invention, the polymer can be, for example, a modified polyvinyl alcohol, comprising a first repeating unit, a second repeating unit and a third repeating unit, wherein the first repeating unit is The second repeating unit is wherein R 1 is C 1-6 alkyl; and, the third repeating unit is where X is or and Y is a hydrophilic polymer group. |