| 摘要 |
The present invention relates to sialic acid derivatives. According to the present invention, there is provided sialic acid derivatives having the general formula (I) (I) wherein, R1 represents hydrogen, an acetyl group, a trityl group, (R5 represents hydrogen or an acetyl group and R6 represents hydrogen, sodium or a methyl group). R2 represents hydrogen or an acetyl group, one of R3 and R4 represents chlorine, -OAc, -OH, , or (R7 represents a hydrogen atom or an acetyl group, R8 represents a hydrogen atom, an acetyl group or a benzyl group, R9 represents a hydrogen atom, an acetyl group, a benzyl group or or wherein R10 represents a hydrogen atom or a benzoyl group), while the other represents -COOR11 wherein R11 represents hydrogen, sodium, or a methyl group. |
