(wherein R represents a residue comprising a reactive group or a group capable of being transformed into the reactive group; n represents an integer of 3 or more; and X represents a residue capable of having the following structure by n in number:
R1s each represent a hydrogen atom or a group capable of being transformed into a hydrogen atom, and 6 or more of R1s may be the same or different)
The compound represented by the above formula (1), which is capable of modifying a physiologically active polypeptide or a derivative thereof, or a low molecular compound while maintaining the physiological activity, or which is useful for improving the stability or water-solubility of the low molecular compound, are provided.
(其中 R 代表包含活性基团或可转化为活性基团的基团的残基;n 代表 3 或 3 以上的整数;X 代表可具有以下结构的残基,其数目以 n 为单位:
R1s 各代表一个氢原子或一个能转变成氢原子的基团,6 个或更多的 R1s 可以相同或不同)
上述式(1)所代表的化合物能够在保持生理活性的同时改变生理活性
多肽或其衍
生物或低分子化合物,或有助于提高低分子化合物的稳定性或
水溶性。