摘要:
This invention discloses chemically modified polyaminosaccharides, in particular chemically modified chitosans, in the molecular structure of which a predetermined proportion of the amino functional groups is sulfonated by the hydrocarbyl sultone compound via a covalent bond. Such chemically modified polyaminosaccharides may be produced by a process of sulfonating an un-modified polyaminosaccharide having amino functional groups by a hydrocarbyl sultone compound in the presence of an organic solvent under a suitable temperature. Chemically modified chitosans of this invention may be used in a variety of applications, including wound healing.
摘要:
The present invention provides a composition for inhibiting melanin production to promote skin whitening, which is characterized by containing compounds represented by formula (I): wherein R1, R2 and R3 are defined as herein. The present invention also provides a method for inhibiting melanin production to promote skin whitening by using the same.
摘要:
This invention discloses chemically modified polyaminosaccharides, in particular chemically modified chitosans, in the molecular structure of which a predetermined proportion of the amino functional groups is sulfonated by the hydrocarbyl sultone compound via a covalent bond. Such chemically modified polyaminosaccharides may be produced by a process of sulfonating an un-modified polyaminosaccharide having amino functional groups by a hydrocarbyl sultone compound in the presence of an organic solvent under a suitable temperature. Chemically modified chitosans of this invention may be used in a variety of applications, including wound healing.