| abstract |
The invention relates to a compound of formula I: wherein - A is present or absent; - X1, X2, X3 and X4 are, independently from each other, an alkyl; - Y1, Y2, Y3 and Y4 are independently from each other a C1-C10 alkyl, - Z1, Z2, Z3 and Z4 are independently from each other a C1-C5 linear alkyl; - R1 is a group allowing to carry out bioorthogonal reactions; and - R2 is group comprising a N. |