| abstract |
The present invention relates to a prodrug or a pharmaceutically acceptable salt thereof comprising a biologically active moiety-linker conjugate D-L, wherein D is a hydroxyl-comprising biologically active moiety; and L is a promoiety comprising a moiety L 1 represented by formula (I) and wherein L 1 is substituted with one to four groups L 2 -Z and optionally further substituted, provided that the hydrogen marked with the asterisk in formula (I) is not replaced by a substituent; wherein L 2 is a single chemical bond or a spacer and Z is a carrier group. The invention also relates to pharmaceutical compositions comprising said prodrugs and their use as medicaments. |