The present invention is related to a compound according to formula (I),wherein R1 and R2 areeach and independently selected from the group comprising alkyl; n is anyinteger between 1 and4; R3 is an acyl selected from the group comprising lysyl, ornithyl, 2,4-diaminobutyryl, histidyland an acyl moiety according to formula (II), wherein m is any integer from 1to 3 and Y is apharmaceutically acceptable anion.