Griseolic acid monoesters, their preparation and use
申请人:SANKYO COMPANY LIMITED
公开号:EP0319316A2
公开(公告)日:1989-06-07
Monoester griseolic acid derivatives of formula (I):
(in which: R1 and R2 are the same or different and each represents a hydrogen atom, a hydroxy group or a protected hydroxy group; R3 and R4 each represents a hydrogen atom, or together represent an extra carbon-carbon bond between the two carbon atoms to which they are attached; one of RS and R6 represents a hydrogen atom and the other represents a carboxy-protecting group removable in the biochemical environment of the human eye); and pharmaceutically acceptable salts thereof have been found to have valuable properties in the treatment of ophthalmic disorders. They may be prepared by the selective esterification of the appropriate free acid.
Gold Nanoparticles Functionalized with Gadolinium Chelates as High-Relaxivity MRI Contrast Agents
作者:Loïck Moriggi、Caroline Cannizzo、Eddy Dumas、Cédric R. Mayer、Alexey Ulianov、Lothar Helm
DOI:10.1021/ja904094t
日期:2009.8.12
Water-dispersible gold nanoparticles functionalized with paramagnetic gadolinium have been fully characterized, and the NMRD profiles show very high relaxivities up to 1.5 T. Characterization using TEM images and dynamic light scattering indicate a particle size distribution from 2 to 15 nm. The gold cores of the nanoparticles do not contribute significantly to the overall magnetic moment.
用顺磁性钆功能化的水分散性金纳米粒子已得到充分表征,NMRD 分布图显示出高达 1.5 T 的非常高的弛豫度。使用 TEM 图像和动态光散射的表征表明,粒径分布在 2 到 15 nm 之间。纳米颗粒的金核对整体磁矩没有显着贡献。