| 摘要 |
A compound of formula (II), wherein R1 is hydrogen and R2 is hydrogen or, for only one of its n substituents, a deoxy residue in the 3 position of the cholesterol or a mono- or polyvalent residue of a cholesterol derivative having one or more reactive groupings, respectively, said groupings being capable of reacting with a secondary amine group of a polyamine molecule; n is an integer from 2 to 6; and p is an integer from 2 to 6 and identical or different in the n (a) fragments. |
