| abstract |
[PROBLEMS] To provide (1) low toxicity to a living body, (2) high inclusion rate, (3) excellent systemic blood vessel and liver imaging, (4) excellent pancreatic imaging, and (5) another 24 hours. The present invention provides a novel cholesterol derivative, liposome, and an X-ray contrast medium containing the liposome, which are safe to be excreted most of the body within the body. A cholesterol derivative represented by the following general formula (1): (In the formula, G represents a sugar bonded through a monovalent residue in which an ether bond is formed at the anomeric position of the sugar) [Selection figure] None |