abstract |
(57) [Summary] [Structure] Formulas (1) and (2): A vinyl acetylsalicylate-vinyl alcohol copolymer and a precursor copolymer thereof, each of which has a structural unit represented by [Effect] It has a medicinal effect as acetylsalicylic acid, the content of vinyl acetylsalicylate unit and vinyl alcohol unit, the degree of polymerization, etc. can be controlled. To be done. |