The present invention provides compounds having the general formula ##STR1## wherein R is ##STR2## and A is 0 or 1, B is 0 to 4, C is 0 to 4, Z is Se or Te, R.sup.6 is --OH or an amino acid residue, R.sup.7 is hydrogen or saturated C.sub.1 to C.sub.4 alkyl group, when A is 1, R.sup.8 is hydrogen or saturated C.sub.1 to C.sub.4 alkyl group, N is 0 or 1, R.sup.2, r.sup.3, r.sup.4 and R.sup.5 are independently hydrogen or an .alpha.- or .beta.-hydroxyl group, or an oxo group, H.sup.5 is an .alpha.- or .beta.-H. The subject compounds, particularly the gamma emitting isotopes, are useful in the investigation of body functions.
本发明提供具有一般式##STR1##的化合物,其中R为##STR2##,A为0或1,B为0至4,C为0至4,Z为Se或Te,R.sup.6为--OH或
氨基酸残基,R.sup.7为氢或饱和的C.sub.1至C.sub.4烷基基团,当A为1时,R.sup.8为氢或饱和的C.sub.1至C.sub.4烷基基团,N为0或1,R.sup.2、r.sup.3、r.sup.4和R.sup.5独立地为氢或α-或β-羟基团,或酮基,H.sup.5为α-或β-H。这些化合物,特别是γ放射性同位素,在研究机体功能方面具有用处。